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Cite as: [2017] EWCA Civ 65, 170 Con LR 1, [2017] BLR 203

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Neutral Citation Number: [2017] EWCA Civ 65
Case No: A1/2016/2252

IN THE COURT OF APPEAL (CIVIL DIVISION)
ON APPEAL FROM High Court, QBD, Technology and Construction Court
Miss Recorder Jefford QC
HT2014000117

Royal Courts of Justice
Strand, London, WC2A 2LL
10/02/2017

B e f o r e :

LORD JUSTICE JACKSON
LORD JUSTICE SIMON
and
LORD JUSTICE FLAUX

____________________

Between:
Carillion Construction Limited
Appellant / Claimant
- and -


Emcor Engineering Services Limited

- and -

Emcor (UK) Limited
Respondent/3rd Defendant

Respondent/4th Defendant

____________________

Paul Reed QC & Edmund Neuberger (instructed by Reynolds Porter Chamberlain LLP) for the Appellant
Paul Cowan & Simon Hale (instructed by White & Case LLP) for the 3rd & 4th Respondents
Hearing date : Thursday 2nd February 2017

____________________

HTML VERSION OF JUDGMENT
____________________

Crown Copyright ©

    Lord Justice Jackson :

  1. This judgment is in five parts, namely:
  2. Part 1 – Introduction Paragraphs 2 - 8
    Part 2 – The facts Paragraphs 9 - 17
    Part 3 – The litigation Paragraphs 18 - 24
    Part 4 – The appeal to the Court of Appeal Paragraphs 25 - 33
    Part 5 – Decision Paragraphs 34 - 56
    i) The natural meaning of clause 11.3 of the sub-contract conditions. Paragraphs 39 - 40
    ii) The authorities on extension of time. Paragraphs 41 - 44
    iii) Commercial Common Sense Paragraphs 45 - 56

    Part 1 – Introduction
  3. This is an appeal by a main contractor against a decision on preliminary issues concerning delay and extension of time. The central issue is whether any extension of time granted under the standard "DOM/2" form of sub-contract must commence on what was previously the due date for completion. The question is of some importance for the construction industry.
  4. The main contractor in this case and claimant in the proceedings is Carillion Construction Limited, to which I shall refer as "Carillion". The relevant sub-contractor, which is third Defendant in the proceedings, is Emcor Engineering Limited. I shall refer to it as "Emcor". Emcor (UK) Limited, which is the fourth defendant, provided a parent company guarantee in respect of Emcor.
  5. The employer under the main contract is Rolls Development UK Limited, to which I shall refer as "Rolls". Another sub-contractor which will feature in the narrative is AECOM Limited. I shall refer to that company as "AECOM".
  6. In this judgment I shall use the following abbreviations:
  7. "LAD" means liquidated and ascertained damages.
    "M+E" means mechanical and electrical.
    "TCC" means Technology and Construction Court.
  8. The building which is the subject of this litigation is the Rolls Building in Fetter Lane, London EC4. That is where the Commercial Court, the Chancery Division and the TCC now sit.
  9. Both the parties and the judge at first instance have used the word "contiguous" to describe an extension of time which starts on what was previously the due date for completion. I shall do the same. I will use the word "non-contiguous" to describe an extension of time which starts on some later date.
  10. After these introductory remarks, I must now turn to the facts.
  11. Part 2 – The Facts
  12. By a written building contract dated 14th June 2007, Rolls employed Carillion to develop the Rolls Building in Fetter Lane for use as offices and courtrooms. The contract was on the JCT Standard Form of Contract with Contractor's Design, 1998 edition, incorporating amendment 1(1999), amendment 2(2001) and amendment 4(2002).
  13. Clause 23 of the building contract required Carillion to complete each section of the work by a specified completion date. The sections of the works were redefined and the specified completion dates were revised by subsequent agreements between the parties. The final position was as follows: Carillion were required to complete section B (court fit-out) and section C (fifth floor fit-out) by 28th January 2011. LAD were agreed at the rate of £86,000 per week for delay on section B and £18,000 per week for delay on section C. Completion dates and rates of LAD for other sections of the works are not relevant to this appeal.
  14. Clause 25.2 of the conditions of the building contract required Carillion to give written notice to the employer of any event delaying or likely to delay completion. Clause 25.3 provided:
  15. "25.3 .1 If
    .1 .1 any of the events which are stated by the Contractor to be the cause of the delay is a Relevant Event and
    .1 .2 the completion of such Section is likely to be delayed thereby beyond the Completion Date for such Section,
    the Employer upon receipt of any notice, particulars and estimate under clauses 25.2.1, 25.2.2 and 25.2.3 shall make in writing to the Contractor such extension of time, if any, for completion of such Section beyond the Completion Date for such Section as is then fair and reasonable, by fixing a later date as the Completion Date for such Section."
  16. I turn now to the sub-contracts. Carillion engaged AECOM as sub-contractor for the provision of various M+E services and Emcor as sub-contractor for the provision of other M+E services.
  17. Emcor's sub-contract was dated 18th July 2008. It incorporated the standard form of Domestic Sub-Contract known as "DOM/2", 1981 edition. That sub-contract, although earlier in time, is intended to be used with the 1998 JCT contract.
  18. Clause 11.2 of the sub-contract conditions requires the sub-contractor to give notice of delay or likely delay. Clause 11.3 provides as follows:
  19. "11.3 If on receipt of any notice, particulars and estimate under clause 11.2 the Contractor properly considers that:

    .1 any of the causes of the delay is an act, omission or default of the Contractor, his servants or agents or his sub-contractors, their servants or agents (other than the Sub-Contractor, his servants or agents) or is the occurrence of a Relevant Event; and
    .2 the completion of the Sub-Contract Works is likely to be delayed thereby beyond the period or periods stated in the Appendix, part 4, or any revised such period or periods,

    then the Contractor shall, in writing, give an extension of time to the Sub-Contractor by fixing such revised or further revised period or periods for the completion of the Sub-Contract Works as the Contractor then estimates to be reasonable."
  20. It is necessary to read that provision in context. I therefore attach as an appendix to this judgment the whole of clauses 11 and 12 of the sub-contract conditions. These are taken from the standard DOM/2 form, but include certain amendments made by the parties.
  21. As can be seen from clause 11 of the conditions, Emcor were required to complete their works in accordance with the details set out in part 4 of the appendix to the sub-contract. As a result of subsequent agreements between the parties, part 4 of the appendix underwent successive amendments. The final position was that Emcor were required to commence their section B works (court fit-out) on 5th October 2009 and complete them in 68.57 weeks. Emcor were required to commence their section C works (fifth floor fit-out) on 11th January 2010 and to complete them in 54.57 weeks. The consequence of these provisions was that Emcor were required to complete both the section B and section C works by 28th January 2011. That was also the revised contractual completion date under the main contract.
  22. Unfortunately delays occurred. Carillion did not achieve practical completion under the main contract until 29th July 2011. That was 182 days late. Carillion blamed its sub-contractors for causing delays. The sub-contractors blamed each other and Carillion for causing delays. In those circumstances, perhaps unsurprisingly, litigation followed.
  23. Part 3 – The Litigation
  24. By a claim form issued in the TCC on the 28th November 2014, Carillion claimed relief against AECOM, Emcor and other parties involved in the project.
  25. On 8th March 2016, Carr J ordered the trial of two preliminary issues. Issue 1 was formulated as follows (using "CCL" as an abbreviation for Carillion):
  26. "1. On the assumption that EMCOR is entitled to an extension of time pursuant to clause 11.3 of the EMCOR Sub-Contract (as amended) by fixing such revised or further revised period or periods for the completion of its Sub-Contract Works, does the EMCOR Sub-Contract (as amended) require:
    (a) that such revised or further revised periods are added contiguously to the end of the current period, so as to provide an aggregate period within which EMCOR''s Sub-Contract Works should be completed (as contended for by EMCOR); or
    (b) that such revised or further period or periods are fixed in which EMCOR can undertake its Sub-Contract Works, which are not necessarily contiguous but which reflect the period for which EMCOR has in fact been delayed and is entitled to an extension of time (as contended for by CCL)."
  27. Issue 2 concerned other contractual disputes between Carillion, Emcor and AECOM. Issue 2 does not feature in the present appeal.
  28. The trial of the preliminary issues took place before Miss Recorder Nerys Jefford QC, as she then was, on 6th April 2016. I shall refer to her as "the judge".
  29. The judge handed down her reserved judgment on 28th April 2016. Her decision on preliminary issue 1 was as follows:
  30. "…on the assumption that EMCOR is entitled to an extension of time pursuant to clause 11.3 of the EMCOR Sub-Contract (as amended) by fixing such revised or further revised period or periods for the completion of its Sub-Contract Works, the EMCOR Sub-Contract requires that such revised or further revised period or periods are added contiguously to the end of the current period within which EMCOR''s Sub-Contract Works should be completed;…"
  31. I would summarise the judge's reasoning on issue 1 as follows:
  32. i) The natural meaning of the words used in clause 11.3 of the sub-contract conditions, when read in context, is that any period of extension granted will be added contiguously to the end of the current period within which the sub-contractor is required to complete its works.

    ii) There are situations in which clause 11.3, so interpreted, may lead to an unsatisfactory result. The sub-contractor may incur a liability to the main contractor which is greater than, or less than, the true consequences of his breach.

    iii) Despite those shortcomings, clause 11.3 so interpreted is practicable and workable. It accords with commercial common sense.

    iv) Applying the principles in Arnold v Britton [2015] UKSC 36; [2015] AC 1619, the court should not depart from the natural meaning of the words used in clause 11.3.

    v) The decision of Colman J in Balfour Beatty Building Ltd v Chestermount Properties Ltd (1993) 62 BLR 1 and subsequent decisions following Chestermount are not directly in point. Nevertheless they support Emcor's argument as to how a reasonable person, with the parties' knowledge of the background, would interpret clause 11.3.

  33. Carillion were aggrieved by the judge's decision. Accordingly they appealed to the Court of Appeal.
  34. Part 4 – The appeal to the Court of Appeal
  35. By an appellant's notice filed on 2nd June 2016, Carillion appealed against the judge's decision on issue 1, on grounds which I would summarise as follows:
  36. i) The judge erred in interpreting the natural meaning of clause 11.3.

    ii) Chestermount and the other authorities cited provide no support for the judge's interpretation of clause 11.3.

    iii) The judge's interpretation of clause 11.3 does not accord with commercial common sense.

  37. The appeal came on for hearing on 2nd February 2017. Mr Paul Reed QC, leading Mr Edmund Neuberger, appeared for Carillion, the appellant. Mr Paul Cowan, leading Mr Simon Hale, appeared for Emcor, the respondent. Mr Ben Quiney QC was present at the hearing with a watching brief on behalf on AECOM.
  38. Mr Reed took the court through clause 11 of the sub-contract conditions and the surrounding provisions. He developed an argument that clause 11.3 was permissive. Where a delaying event occurred after the date when the sub-contractor ought to have completed, the main contractor had a choice. He could grant either a contiguous or a non-contiguous extension of time.
  39. Mr Reed argued that this interpretation accorded with the natural meaning of the words of clause 11. Also, unlike the judge's interpretation, it accorded with commercial common sense. Clause 12 of the conditions required the sub-contractor to compensate the main contractor for any loss or damage caused by the sub-contractor's delay. That loss or damage ought to be calculated by reference to the period when the sub-contractor was actually being slow; not by reference to some later period when external events (e.g. variation instructions) were preventing the sub-contractor from completing timeously.
  40. Mr Reed submitted that the judge's interpretation did not sit easily with the prevention principle. The contractor was, in effect, being made subject to obligations which he was prevented from performing. A more reasonable and logical approach would be to grant an extension in respect of the period of time during which the delaying event was operative.
  41. Turning to the authorities cited, Mr Reed submitted that they were of no help. None of them addressed Carillion's argument in the present case. He demonstrated this by taking the court on a rapid journey through the two authorities' bundles. Mr Reed's submissions lost none of their force through being concise and focused. On the contrary they gained force.
  42. Mr Cowan, for Emcor, submitted that the judge's interpretation of clause 11.3 was the only possible interpretation of that provision when read in context. That interpretation did not offend commercial common sense; alternatively, it only did so to a modest extent. Applying the principles in Arnold and Balfour Beatty Regional Construction Ltd v Grove Developments Ltd [2016] EWCA Civ 990; (2016) 168 Con LR 1, the natural meaning of the words used should prevail.
  43. Mr Cowan took the court on a lengthy excursion through the authorities. He did not, however, alight upon any case in which the argument as formulated by Mr Reed had been considered.
  44. Having outlined the parties' respective positions, I must now come to a decision.
  45. Part 5 – The Decision
  46. In this part I shall refer to the date upon which a contractor or sub-contractor is required to complete as "date A". That date may be specified in the contract or sub-contract. Alternatively, date A may be derived from the contract or sub-contract, for example because x weeks are allowed for carrying out the works. Alternatively, date A may be the consequence of one or more extensions of time granted by the person or body empowered to extend time.
  47. I shall refer to a delaying event which occurs after date A as "event B". I shall refer to the date upon which event B actually causes delay to start to occur as "date C". Date C will usually postdate event B. For example, if the event B is an instruction to install additional lighting, date C may be the date when the electrical sub-contractor starts his first fix.
  48. Carillion's case in relation to Emcor's sub-contract is that where a delaying event occurs after date A, the proper way to deal with the matter is to grant a non-contiguous extension of time. In other words, the sub-contractor is liable for all delay between date A and date C, but is not liable for delay during the period following date C. In this way the sub-contractor bears the consequences of the delay for which he is responsible. He does not bear the consequences of the delay caused by event B, which is not his fault.
  49. This is a novel argument, which I do not recall ever encountering, either in practice at the Bar or when sitting as a TCC judge. Mr Reed submits that none of the authorities cited by Mr Cowan address that argument. Mr Reed says that he and Mr Neuberger have done extensive research of law journals and overseas authorities, but have not found any relevant material.
  50. Let me now deal with the grounds of appeal in the order set out in paragraph 25 above.
  51. (i) The natural meaning of clause 11.3 of the sub-contract conditions.

  52. In my view, whether one reads clause 11.3 in isolation or in its full context, the natural meaning of the words used is that the extension should be contiguous. I say this for five reasons:
  53. a) The phrase "any such revised period or periods" in clause 11.3.2 indicates that when the employer grants extensions of time he is revising the period or periods stated in part 4 of the appendix, not granting separate periods of justified delay with their own start and end dates.
    b) The simple phrase "extension of time" in the last part of clause 11.3 has the natural meaning that the period of time which is allowed for the work is being made longer.
    c) The next phrase in the last part of clause 11.3 "by fixing such revised or further revised period or periods" naturally conveys the same meaning.
    d) The notice provision in clause 11.2.2.2 includes the telling phrase "beyond the expiry of the period or periods stated in the appendix part 4 or beyond the expiry of any extended period or periods previously fixed under clause 11" (my underlining). Those words indicate that if the employer has granted an extension of time, he will have increased the length of the existing period or periods for doing sections of the work, not created new periods for doing the work, each with their own start and end dates.
    e) More generally, as I read and re-read the provisions of clauses 11 and 12, they all fit naturally with the assumption that any extensions of time granted will be contiguous.
  54. I therefore reject the first ground of appeal.
  55. (ii) The authorities on extension of time

  56. Let me now turn to the authorities cited by the judge and heavily relied upon by Mr Cowan. In Chestermount date A was 9th May 1989. Event B was a group of variation instructions issued between February and July 1990. The architect granted a contiguous extension of time to September 1989 on the basis that the variation instructions had caused four months delay. The contractor contended that the architect should have granted an extension of time for the entire period from 9th May 1989 to late 1990. The judge rejected that argument. He held that the extension of time should be the period of actual delay caused by the variation instructions; that extension of time should start on date A and thus it should end well before event B (the variation instructions) occurred.
  57. The important feature of Chestermount is that both parties accepted that the extension of time should be contiguous. The employer was arguing for a short contiguous extension, limited in length to the actual period of the delay caused by the variation instructions. The contractor was arguing for a long contiguous extension, namely covering the whole period up to event B plus four months thereafter for the actual delay caused by event B. Neither party invited the arbitrator or the judge to award a non-contiguous extension of time starting on date C.
  58. Similar comments apply to each of the other authorities cited. The authorities which we have reviewed are: Floods of Queensferry Limited v Shand Construction Limited [1999] B.L.R 319; Ascon Construction Limited v Alfred McAlpine Construction Isle of Man Limited (1999) 66 Con LR 119; Henry Boot Construction (UK) Ltd v Malmaison Hotel (Manchester) Ltd (1999) 70 Con LR 32; Multiplex Construction (UK) Ltd v Honeywell Control Systems Ltd [2007] BLR 195; Adyard Abu Dhabi v SD Marine Services [2011] EWHC 848 (Comm); [2011] BLR 384; Walter Lilly & Company Limited v Mackay [2012] EWHC 1773 (TCC) and McAlpine Humberoak Ltd v McDermott International Inc (No 1) (1992) 58 BLR 1. These cases involve main contracts and sub-contracts on a variety of standard forms. There are two common strands in the decisions. First, in each case the court only allowed extensions of time reflecting the actual delay caused by event B. Secondly, it was common ground between the parties that whatever extensions of time were awarded should be contiguous. In no case did either party contend that there should be an intervening period during which the contractor or sub-contractor was liable for delay, followed by a non-contiguous extension of time.
  59. I therefore agree with Mr Reed's contention that the authorities relied upon by Mr Cowan do not provide any direct support for Emcor's case. On the other hand, the judge was right to say that those authorities support Emcor's argument as to how a reasonable person with the parties' knowledge of the background would understand clause 11.3. The blunt fact is that until the present litigation, apparently no one has ever argued that any extension of time clause requires or permits non-contiguous extensions of time to be granted.
  60. (iii) Commercial Common Sense

  61. Mr Reed submits that, as a matter of commercial common sense, his interpretation of clause 11.3 should prevail.
  62. Recent case law establishes that only in exceptional circumstances can considerations of commercial common sense drive the court to depart from the natural meaning of contractual provisions. See Arnold at [19] to [20]. In Grove the Court of Appeal applied those principles to a construction contract, which operated harshly against the interests of a contractor. The court declined to depart from the natural meaning of the contractual provisions.
  63. I turn now to the substantive argument. Mr Reed points out that on the judge's interpretation of clause 11.3 Emcor may be exempted from liability under clause 12 during a period when Emcor is in culpable delay. Emcor would then be made liable to the employer under clause 12 during a period when Emcor is not in culpable delay, for example because it is complying with a late variation instruction. The loss and damage suffered by Carillion during those two periods is unlikely to be the same. Therefore one or other party will gain a windfall benefit.
  64. I am unable to see any answer to this argument. It is, at the very least, an oddity. We pressed Mr Cowan with this point in argument. He too was unable to suggest any convincing answer to it.
  65. I am therefore bound to accept the logic of Mr Reed's argument. On the other hand, as Oliver Wendell Holmes famously observed in his lectures on The Common Law, "the life of the law has not been logic: it has been experience". In practice the system of awarding extensions of time contiguously has worked satisfactorily, even though it is open to the criticisms which Mr Reed advances. It appears that no contractor or sub-contractor in a reported case has ever before felt the need to argue that awards of time should be non-contiguous.
  66. In the case of main contractors that omission is not surprising. Liquidated and ascertained damages are normally levied at a specified rate per week or per month. Therefore, it makes no difference whether any extension of time granted is contiguous or non-contiguous. In the case of sub-contractors, however, the position is different. Their liability for delay is often calculated (as in this case) by reference to the loss and damage which their delay has caused to the main contractor or to some other sub-contractor higher up the chain.
  67. The judge accepted that anomalies of the kind identified by Carillion may arise. In her view, those possible scenarios were not sufficient to displace the natural interpretation of clause 11.3. I have come to the same conclusion. As the judge rightly observed, Emcor's interpretation of clause 11.3 is practicable and workable. It accords to what a reasonable person, with all the background knowledge of the parties, would have understood the clause to mean on the date when the sub-contract was made.
  68. Let me now draw the threads together. I am, perhaps, more troubled than was the judge by the anomalies to which clause 11.3 may give rise, especially in a case such as the present where there are multiple sub-contractors, who are said to have caused delay. On the other hand, I am in agreement with the judge that these considerations cannot displace the natural meaning of the words used in clause 11.
  69. This is a case in which the parties, although following the wording of a standard form sub-contract, have made what may turn out in particular circumstances to be a bad bargain for one or other of them. That is no reason to depart from the natural meaning of the words which they used or adopted.
  70. I turn now to Mr Reed's 'prevention' argument. If (a) an employer delays a contractor or a contractor delays a sub-contractor and (b) there is no mechanism for extending the time allowed for completion of that contractor's or sub-contractor's work, then time becomes at large. The contractor or sub-contractor is no longer required to complete by a specified date or within the contractually specified period. There is, ordinarily, substituted an obligation to complete within a reasonable time: See Multiplex and Adyard.
  71. In the present case the sub-contract contains a perfectly workable extension of time clause. If event B causes, say, two months delay, then the sub-contractor obtains a two month extension of time. The fact that the extension commences on date A, not date C, does not bring the prevention principle into operation. The sub-contractor is not prevented from carrying out the sub-contract works within the extended period which the sub-contract allows. If the sub-contractor fails to complete within that period (either through its own fault or because of the fault of others for whom the sub-contractor is responsible, or because of events for which the sub-contractor bears the risk) then the sub-contractor is liable to the main contractor under clause 12 of the conditions. The question whether the extension of time is contiguous or non-contiguous may affect the quantification of that liability. But it does not bring into play the prevention principle.
  72. In the result, therefore, I would dismiss this appeal.
  73. Lord Justice Simon :

  74. I agree.
  75. Lord Justice Flaux :

  76. I also agree.
  77. APPENDIX

    Sub-Contractor's obligation – carrying out and completion of Sub-Contract Works – extension of Sub-Contract time

    Sub-Contract Works – details in Appendix – progress of works

    11.1 The Sub-Contractor shall carry out and complete the Sub-Contract Works in accordance with the details in the Appendix, part 4, and reasonably in accordance with the progress of the Works and in accordance with the Contractor's programme for the Works as issued by the Contractor from time to time but subject to receipt of the notice to commence work on site as stated in the Appendix, part 4, and to the operation of clause 11.

    Without prejudice to the generality of the foregoing, prior to the commencement of the Sub-Contract Works and thereafter at all times during the progress of the Sub-Contract Works, the Sub-Contractor shall plan, carry out and complete all parts of the Sub-Contract Works in such order, in such manner and at such times and within such periods as will be compatible with and will not delay, disrupt or conflict with any part of the Works, as such programme may be revised by the Contractor from time to time.

    The Sub-Contractor shall revise its programme for the Sub-Contract Works as and when required to take account of any alterations to the Contractor's programme for the Works and shall promptly deliver to the Contractor two copies of such revised programme, or such other number of copies as the Contractor may reasonably require.

    The Sub-Contractor shall carry out and complete all parts of the Sub-Contract Works in accordance with its programme for the Sub-Contract Works, provided that in the event of any conflict between the Contractor's programme and the Sub-Contractor's programme the Contractor's programme shall prevail, unless otherwise agreed in writing.

    The provisions of the last three paragraphs of this clause are without prejudice to the Sub-Contractor's entitlements under clause 11.2, 11.3 and 13.

    Extension of Sub-Contract time – written notice of delay

    11.2

    11.2.1 If and whenever it becomes reasonably apparent that the commencement, progress or completion of the Sub-Contract Works or any part thereof is being or is likely to be delayed, the Sub-Contractor shall forthwith give written notice to the Contractor of the material circumstances including, insofar as the Sub-Contractor is able, the cause of causes of the delay and identify in such notice any matter which in his opinion comes within clause 11.3.1.

    Particulars, estimates, and further written notices 11.2.2 In respect of each and every matter which comes within clause 11.3.1, and identified in the notice give [sic] in accordance with clause 11.2.1, the Sub-Contractor shall, if practicable in such notice, or otherwise in writing as soon as possible after such notice:
    1. give particulars of the expected effects thereof; and
    2. estimate the extent, if any, of the expected delay in the completion of the Sub-Contract Works or any part thereof beyond the expiry of the period or periods stated in the Appendix part 4 or beyond the expiry of any extended period or periods previously fixed under clause 11 which results therefrom whether or not concurrently with delay resulting from any other matter which comes within clause 11.3.1; and
    3. the Sub-Contractor shall give such further written notices to the Contractor as may be reasonably necessary or as the Contractor may reasonably require for keeping up-to-date the particulars and estimate referred to in clause 11.2.2.1 and .2 including any material change in such particulars or estimate.

    Act, omission or default of Contractor or Relevant Event

    11.3 If on receipt of any notice, particulars and estimate under clause 11.2 the Contractor properly considers that:

    .1 any of the causes of the delay is an act, omission or default of the Contractor, his servants or agents or his sub-contractors, their servants or agents (other than the Sub-Contractor, his servants or agents) or is the occurrence of a Relevant Event; and
    .2 the completion of the Sub-Contract Works is likely to be delayed thereby beyond the period or periods stated in the Appendix, part 4, or any revised such period or periods,

    then the Contractor shall, in writing, give an extension of time to the Sub-Contractor by fixing such revised or further revised period or periods for the completion of the Sub-Contract Works as the Contractor then estimates to be reasonable.

    Time limit for fixing the revised period or periods for the Sub-Contract Works

    11.4

    11.4.1 When fixing such revised period or periods, the Contractor shall, if reasonably practicable having regard to the sufficiency of the notice, particulars and estimate, fix such revised period or periods within the following time limit:
    1. not later than 16 weeks from the receipt by the Contractor of the notice and of reasonably sufficient particulars and estimates; or
    2. where the time between receipt thereof and the expiry of the period or periods for the completion of the Sub-Contract Works is less than 16 weeks, not later than the expiry of the aforesaid period or periods.
    11.4.2 The Contractor, when fixing such revised period or periods, shall state:
    1. which of the matters, including the Relevant Events, referred to in clause 11.3.1, he has taken into account; and;
    2. the extent, if any, to which the Contractor has had regard to any direction requiring as a Variation the omission of any work or obligation or restriction issued since the previous fixing of any such revised period or periods for the completion of the Sub-Contract Works.

    Extension of Sub-Contract time

    11.5 If, upon receipt of any notice, particulars and estimate under clause 11.2 the Contractor properly considers that he is unable to give, in writing, an extension of time to the Sub-Contractor, the Contractor shall, if reasonably practicable having regard to the aforesaid notice, particulars and estimate, so notify the Sub-Contractor in writing not later than 16 weeks from receipt of the notice, particulars and estimate, or, where the time between such receipt and the expiry of the period or periods for the completion of the Sub-Contract Works is less than 16 weeks, not later than the expiry of the aforesaid period or periods.

    Omission of work

    11.6 After the first exercise by the Contractor of the duty under clause 11.3, or after any revision to the period or periods for the completion of the Sub-Contract Works stated by the Contractor in his acceptance of 4.6 Quotation in respect of a variation, the Contractor may in writing fix a period or periods for completion of the Sub-Contract Works shorter than that previously fixed under clause 11.3 or stated by the Contractor in his acceptance of a 4.6 Quotation if, in the opinion of the Contractor, the fixing of such shorter period or periods is fair and reasonable having regard to any direction issued requiring as a Variation the omission of any work or obligation or restriction where such issue is after the last occasion on which the Contractor made a revision of the aforesaid period or periods PROVIDED that no decision under clause 11.6 shall alter the length of any revision to the period or periods for the completion of the Sub-Contract Works in respect of a Variation for which a 4.6 Quotation has been given and which has been stated by the Contractor in his acceptance of the 4.6 Quotation, or any decision of the Adjudicator under clause 38A or of an arbitrator or the Courts under Clause 38B or 38C, as the case may be.

    Review of Period for Completion of Sub-Contract Works

    11.7 If the expiry of the period when the Sub-Contract Works should have been completed in accordance with clause 11.1 occurs before the date of practical completion of the Sub-Contract Works established under clause 14.1 or 14.2, the Contractor may

    and

    not later than the expiry of 16 weeks from the aforesaid date of practical completion of the Sub-Contract Works, the Contractor shall

    either:

    11.7.1 fix such a period or periods for completion of the Sub-Contract Works longer than that previously fixed under clause 11 or stated by the Contractor in his acceptance of a 4.6 Quotation as the Contractor properly considers to be fair and reasonable having regard to any of the matters referred to in clause 11.3.1, whether upon reviewing a previous decision or otherwise and whether or not the matters referred to in clause 11.3.1 have been specifically notified by the Sub-Contractor under clause 11.2; or
    11.7.2 fix such a period or periods for completion of the Sub-Contract Works shorter than that previously fixed under clause 11 as the Contractor properly considers to be fair and reasonable having regard to any direction issued requiring as a Variation the omission of any work where such issue is after the last occasion on which the Contractor made a revision of the aforesaid period or periods; or
    11.7.3 confirm to the Sub-Contractor the period or periods for the completion of the Sub-Contract Works previously fixed.
    Provided that no decision under clause 11.7.2 or 11.7.3 shall alter the length of any revision to the period or periods for the completion of the Sub-Contract Works in respect of a Variation for which a 4.6 Quotation has been given and which has been stated by the Contractor in his acceptance of the 4.6 Quotation, or any decision of the Adjudicator under clause 38A or of an arbitrator or the Courts under Clause 38B or 38C, as the case may be.

    Sub-Contractor's best endeavours to prevent delay

    11.8 The operation of clause 11 shall be subject to the proviso that the Sub-Contractor shall use constantly his best endeavours to prevent delay in the progress of the Sub-Contract Works or any part thereof, however caused, and to prevent any such delay resulting in the completion of the Sub-Contract Works being delayed or further delayed beyond the period or periods for completion, and the Sub-Contractor shall do all that may reasonably be required to the satisfaction of the Employer and the Contractor to proceed with the Sub-Contract Works. Save in respect of clause 11.10.3, the Sub-Contractor shall not become entitled to an extension of time under clause 11 to the extent that any Relevant Event (as referred to in clause 11.3.1) is consequent upon any error, omission, negligence or default of the Sub-Contractor or of any sub-contractor or supplier of the Sub-Contractor or any of his or their employees or agents.

    Limitation on power to fix shorter period or periods for completion of the Sub-Contract Works

    11.9 No decision of the Contractor under clauses 11.2 to .7 inclusive shall fix a period or periods for completion of the Sub-Contract Works which will be shorter than the period or periods stated in the Appendix part 4.

    Relevant Events

    11.10 The following are the Relevant Events referred to in clause 11.3.1:

    …

    11.11 If in the reasonable opinion of the Contractor the Sub-Contractor is failing to carry out the Sub-Contract Works or any part thereof in accordance with clause 11.1, the Contractor may, upon giving notice to the Sub-Contractor and in the event of the Sub-Contractor failing to rectify the situation within 7 days, and without prejudice to any of the Contractor's other rights and remedies:

    11.11.1 perform the Sub-Contract Works or the relevant part thereof, whether by itself or by others; and/or
    11.11.2 issue instructions to the Sub-Contractor removing the relevant parts of the Sub-Contract Works from the Sub-Contract, and may employ others to carry out these sections, and in such event the price for the Sub-Contract Works shall be reduced by the value of the removed parts,
    and any additional expenditure incurred by the Contactor in so doing shall be recoverable from the Sub-Contractor as a debt or may be deducted from any monies due or to become due to the Sub-Contractor under this Sub-Contract.

    11.12 If, for any reason which does not entitle the Sub-Contractor to an extension of time for completion of the Sub-Contract Works, the rate of progress of the Sub-Contract Works is at any time in the opinion of the Contractor too slow to ensure practical completion of the Sub-Contract Works within the period or periods for completion stated in the Appendix part 4 or in the Contractor's programme for the Works or any revised period or periods fixed under clause 11 or any revised period or periods stated by the Contractor in his acceptance of a 4.6 Quotation, the Contractor shall notify the Sub-Contractor in writing accordingly ("the Clause 11.12 Notice") and the Sub-Contractor shall thereupon take such steps as are necessary and to which the Contractor may consent to expedite the progress of the Sub-Contract Works so as to complete the Sub-Contract Works within the said period or periods (or revised period or periods) for completion. The Sub-Contractor shall not be entitled to any payment or extension of time for taking such steps.

    If the Sub-Contractor fails to take such steps within 4 days of the date of service of the Clause 11.2 Notice, then the Contractor may employ and pay other persons to take such steps (or the Contractor may take such steps himself) and all costs incurred and monies expended in connection therewith shall be recoverable by the Contractor from the Sub-Contractor as a debt or may be deducted from any monies otherwise due (or to become due) to the Sub-Contractor under the Sub-Contract.

    Failure of the Sub-Contractor to complete on time

    12.1 If the Sub-Contractor fails to complete the Sub-Contract Works within the period or periods for completion or any revised period or periods as provided in clause 11, the Contractor shall so notify the Sub-Contractor in writing within a reasonable time of the expiry of that period or those periods.

    12.2 On receipt of the notice referred to in clause 12.1 the Sub-Contractor shall pay or allow to the Contractor a sum equivalent to any loss or damage suffered or incurred by the Contractor and caused by the failure of the Sub-Contractor as aforesaid.


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