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You are here: BAILII >> Databases >> England and Wales High Court (Commercial Court) Decisions >> Mercuria Energy Trading SA v Onex DMCC [2026] EWHC 130 (Comm) (22 January 2026) URL: https://www.bailii.org/ew/cases/EWHC/Comm/2026/130.html Cite as: [2026] EWHC 130 (Comm) |
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Neutral Citation Number: [
2026]
EWHC
130
(
Comm)
Case No: CL-2023-000033
IN THE HIGH COURT OF JUSTICE
KING'S BENCH DIVISION
BUSINESS AND PROPERTY COURTS OF ENGLAND AND WALES
COMMERCIAL
COURT
Royal Courts of Justice, Rolls Building
Fetter Lane, London, EC4A 1NL
Date: 22 January
2026
Before :
LIONEL PERSEY KC
(sitting as a Judge of the High Court)
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Between :
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Claimant | |
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- and –
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Defendant |
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David Lewis KC and Andrew Feld (instructed by Stephenson Harwood LLP) for the Claimant
Simon Rainey KC and Henry Ellis (instructed by Hill Dickinson LLP) for the Defendant
Hearing dates: 7-8, 12 and 14 May 2025
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Judgment Approved
This judgment was handed down remotely at 10.30am on 27th January
2026
by circulation to the parties or their representatives by e-mail and by release to the National Archives.
Mr Lionel Persey KC:
Introduction
The witnesses
The Cargo and Organic Chlorides
common
for SRFO to be sold into the US at a differential to Brent, it can be traded at a differential to a cracked fuel oil benchmark. The differential that might be achievable to Brent prices varies depending on, amongst other factors, the market prices of gasoil and gasoline relative to Brent.
The facts
common
ground that the high Organic Chlorides in the Cargo originated from the parcel loaded from the MT "GOOD NEWS" at Kaz. This parcel comprised approximately 51% of the total Cargo.
common
ground between the Parties that the analysis in this CoA was erroneous. No explanation has been given as to the circumstances in which the CoA came to be produced.
commenced
lightering into MT "PACIFIC PEARL". Thereafter a series of tests using a variety of test methods were performed on behalf of Mercuria and Valero in an attempt to ascertain the exact Organic Chloride content of the Cargo.
commenced
discharging into Tanks 8033, 8020 and 8003. Mr von Schweinitz was at the time assessing the possibility of blending part of the Cargo with a Mexican cargo of SRFO from Vitol.
(1) On 3 February 2023, Mercuria sold part of the Cargo to Trafigura ("the Trafigura Resale"). The Trafigura Resale was for 300,000-400,000bbls "HSSR, IRAQI ORIGIN" FOB Borco in the period 4-20 February 2023. The price was the mean of Platts Gulf Coast Houston No. 6 Fuel Oil 3% quotations plus a premium of USD 3.00/bbl, with a pricing period of 8-28 February 2023 for the first 300,000bbls and 10 consecutive quotes after the BL date for the balance. The Trafigura Resale came about in circumstances where Trafigura required a specific quality of fuel oil for a blend they were preparing for a sale into the Dominican Republic for use in a power generation plant. On 8 February 2022, Mr von Schweinitz discussed this Trafigura Resale with Mr Taeeb: "I hear you think I sold too cheaply from Borco, some of the contaminated Iraqi I got from you... You have not presented me with a bid while I had asked that from you to rectify the chlorides situation. I have tried for months to get this cargo sold.... Given you have literally flooded the market with Iraqi HSSR in the last months, you made it impossible really to correct. It would have taken like a 20% of min with 80% of other ie need to buy 4m bbls to rectify 1mb, huge cost... numbers that you and others are selling in the USG are pretty close to cracked levels". On 19 February 2023, Mercuria delivered 392,652.23bbls of the Cargo to Trafigura under the Trafigura Resale;
(2) On 9 February 2023, Mercuria resold a further parcel of the Cargo to Shell ("the Shell Resale"). The Shell Resale was for 56,000bbls +/- 5% "HSFO" ex-tank Borco during the period 11-15 February. The price was the mean of Platts Gulf Coast Houston No. 6 3% Fuel Oilquotations in the period 13-15 February 2023 plus a premium of USD 0.8/bbl. On 12 February 2023, Mercuria delivered 59,010.94 bbls of the Cargo to Shell under the Shell Resale;
(3) On 13 February 2023, Mercuria resold a further parcel of the Cargo to Hartree Partners LLP ("the Hartree Resale"). The Hartree Resale was for 454,000bbls "HIGH SULPHUR STRAIGHT-RUN OR SOMO IRAQI ORIGIN" FOB Borco in the period 13 to 14 February 2023. The price was the mean of Platts USGC HSFO during the period 13-28 February 2023 plus a premium of USD 3.25/bbl. The Hartree Resale came about because Hartree needed supply into a power plant in Panama. On 17 February 2023, Mercuria delivered 455,930.40 bbls of the Cargo to Hartree under the Hartree Resale;
(4) On 28 February 2023, Mercuria sold the balance of the Cargo to Buckeye Bahamas Hub Limited ("the Buckeye Resale"). The Buckeye Resale was for 4,005 bbl "IRAQI HSSR" FOB Borco in the period 7-20 March 2023. The price was the mean of Platts USGC HSFO quotations on 7 March 2023 plus a premium of UDS 3.25/bbl. On 10 March 2023, Mercuria delivered 4,005 bbls of the Cargo to Buckeye under the Buckeye Resale.
common
ground between the Parties' experts that none of these in fact provided an accurate assessment. They agreed that the only suitable method for accurately determining the Organic Chloride content was the EN 14077 test method. The Cargo was not analysed using this method at the time. When samples from the Cargo were tested according to the EN 14077 method they showed that the level of Organic Chlorides in them averaged 16ppm.
Liability
The Contract terms
(1) The Recap provided that the "PRODUCT" was:
"... SOMO BASRAH PIPELINE HIGH-SULPHUR STRAIGHT-RUN FUEL OIL IN LINE WITH THE FOLLOWING TYPICALS:
|
Test |
Method |
Unit |
Result |
Min-Max |
|
... |
... |
... |
... |
... |
|
Organic Chloride |
UOP 779 |
ppm (m/m) |
4.10 |
5 Max |
|
...
|
... |
... |
... |
... |
AND MEETING THE FOLLOWING GUARANTEES :
...
[TABLE OF GUARANTEED SPECIFICATIONS: these did not include Organic Chlorides]
...
(2) The Additional Terms provide, inter alia, as follows:
"...
Commodity/Product:
...
ii) Parcel B
SOMO Basrah pipeline high-sulphur straight-run fuel oil in line with typicals as per Table 1
Table 1: SRFO Typicals
|
Test |
Method |
Unit |
Result |
Min-Max |
|
... |
... |
... |
... |
... |
|
Organic Chloride |
UOP 779 |
ppm (m/m) |
4.10 |
5 Max |
|
...
|
... |
... |
... |
... |
Quantity:
...
ii) Parcel B:
150,000 Metric Tonnes, (+/-10%) of SOMO High-Sulphur Straight-Run Fuel Oil.
Quality:
Both parcels meeting all the following specifications specified below in Table 2:
Table 2: Guarantees
[TABLE 2 - these did not include Organic Chlorides]
...
General Terms and Conditions ["the BP GTCs"]:
Except as specifically detailed above, BP Oil International Limited General Terms and Conditions for Sale and Purchases of Crude Oil and Petroleum Products 2015, version 1.2 shall govern this transaction...
(3) The BP GTCs provide, inter alia, as follows:
"... Section 57 - Definitions and Interpretation
57.1 Definitions
In the Agreement (as hereafter defined) unless the context otherwise requires:
...
57.1.3 "the Agreement" means these General Terms and Conditions (including, where applicable, the Schedules attached hereto) together with the Special Provisions;
...
57.1.51 "Product" means wholly or partially refined petroleum product ... of the grade specified in the Special Provisions...
...
57.1.59 "Special Provisions" means the oral or written agreement in which, by reference, these General Terms and Conditions are incorporated to form the Agreement;
...
57.1.61 "typical" means a quality or characteristic often attributable to ... Product from a particular source, given without guarantee and not amounting to a representation or warranty that such typical quality or attribute will be present in the ... Product supplied ...
...
Section 59 - Quality and claims in respect of quantity/quality
59.1 Quality
59.1.1 Unless otherwise stated in the Special Provisions, the quality of ...[the] Product delivered hereunder shall not be inferior to the specification (if any) set out in the Special Provisions. Whether set out in these General Terms and Conditions or in the Special Provisions neither typicals nor any stipulation as to time of delivery shall form part of the ... Product's description, quality or fitness for purpose. This sub-section constitutes the whole of the Seller's obligations with respect to the description, quality and fitness for purpose of the ... Product and (save to the extent that exclusion thereof is not permitted or is ineffective by operation of law) all statutory or other conditions or warranties, express or implied, with respect to the description or satisfactory quality of the ... Product or its fitness for any particular purpose or otherwise are hereby excluded ...
...
74.4 Conflict
In the event of conflict or inconsistency between these General Terms and Conditions and the Special Provisions, the Special Provisions will prevail over these General Terms and Conditions ..."
The issues
(1) Mercuria contends that Onex had an obligation to deliver a Cargo "in line with" a typical Organic Chloride content of 4.1ppm (in the context of a maximum of 5ppm), notwithstanding the incorporation into the Contract of the BP GTCs. Onex says that effect of s.59.1.1 of the BP GTCs is that there was no such obligation;
(2) Alternatively, Mercuria relies upon the terms of the Contract that the Cargo (1) be "100% SOMO IRAQI HSSR", and in any event (2) be not inferior to its specification as "SOMO BASRAH PIPELINE HIGH-SUPHUR STRAIGHT-RUN FUEL OIL". Onex does not dispute that these were terms of the Contract but denies that it was in breach of them.
"In line with the following typicals"
(1) this provision was not incorporated because the BP GTCs were only incorporated "except as specifically detailed above" and the Additional Terms specifically required that the Cargo must be "in line with the following typicals"; and/or
(2) the provision would be in conflict with and/or inconsistent with the provision in the Recap or the Additional Terms that the Cargo be "in line with the following typicals" and so the latter terms prevails; and/or
(3) the Parties had "otherwise stated in the Special Provisions" for the purposes of section 59.1.1.
(1) The Parties in describing the "Product" by reference to "TYPICALS" were using the term in the sense defined in the definitions section of the BP GTCs at Section 57.1.61, i.e. that it is a quality or characteristic "often attributable to the "Product" but given without guarantee and without any promise that the typical quality or attribute would in fact be present";
(2) Section 59.1.1 of the BP GTCs is the exclusive contractual provision dealing with "Quality of Product" and confined this to the agreed "Specifications" set out in and as part of the Recap under the heading "Quality" and in Table 2 thereof;
(3) Section 59.1.1 took full effect in excluding "typicals" as not forming part of the description, quality etc of the "Product";
(4) The words "in line with" do not override the preceding provisions; and
(5) There is no conflict between section 59.1.1 (or section 57.6.1) and the Recap and/or the Additional Terms, nor did the Parties "otherwise state in the Special Provisions" for the purposes of Section 59.1.1.
"... there is a distinction between a printed term which qualifies or supplements a specially agreed term and one which transforms or negates it. In order to decide on which side of this line any particular term falls, the question is whether the two clauses can be read together fairly and sensibly so as to give effect to both. This question must be approached practically, having regard to business
common
sense, and is not a literal or mechanical exercise. It will be relevant to consider whether the printed term effectively deprives the special term of any effect (some of the cases describe this as the special term being "emasculated"), but in my view it [is] more helpful to say that it is deprived of effect). If so, the two clauses are likely to be inconsistent. It will also be relevant to consider whether the specially agreed term is part of the main purpose of the contract or, which is much the same thing, whether if forms a central feature of the contractual scheme. If so, a printed term which detracts from that scheme is likely to be inconsistent with it. Ultimately, the object is to ascertain the intention of the parties as it appears from the language in its
commercial
setting ..."
"... The court's task is to ascertain the objective meaning of the language which the parties have chosen in which to express their agreement. The court must consider the language used and ascertain what a reasonable person, that is a person who has all the background knowledge which would reasonably have been available to the parties in the situation in which they were at the time of the contract, would have understood the parties to have meant. The court must consider the contract as a whole and, depending on the nature, formality and quality of drafting of the contract, give more or less weight to elements of the wider context in reaching its view as to the objective meaning of the language used. If there are two possible constructions, the court is entitled to prefer the construction which is consistent with business
common
sense and to reject the other. Interpretation is a unitary exercise; in striking a balance between the indications given by the language and the implications of the competing constructions, the court must consider the quality of drafting of the clause and it must also be alive to the possibility that one side may have agreed to something which with hindsight did not serve his interest; similarly, the court must not lose sight of the possibility that a provision may be a negotiated compromise or that the negotiators were not able to agree more precise terms. This unitary exercise involves an iterative process by which each suggested interpretation is checked against the provisions of the contract and its
commercial
consequences are investigated. It does not matter whether the more detailed analysis
commences
with the factual background and the implications of rival constructions or a close examination of the relevant language in the contract, so long as the court balances the indications given by each ..."
(1) First, the approach to construction depends upon ascertaining the intention of the parties as it appears from the language that they have used against the
commercial
setting in which the contract has been concluded. In other words, the court must ascertain what a reasonable person, that is to say a person who has all the background knowledge which would reasonably have been available to the parties in the situation in which they were at the time of the contract, would have understood the parties to have meant.
(2) Secondly, there is no magic in the fact that a contract contains both printed and specially agreed terms. The correct approach to construction is to take a practical approach, and not a literal or mechanical one.
(3) Thirdly, if upon a practical construction, the printed term effectively deprives the special term of any effect, then the two clauses are likely to be inconsistent.
(4) Fourthly, if, however, the two clauses can be read fairly and sensibly so as to give effect to both then the court is likely to construe the Contract accordingly.
"... quite wrong to approach this question of construction with any predisposition to find inconsistency between the special condition and the [printed terms]. They are all part of the same contract ... the parties expressly chose to make their contract subject to the [printed terms]..."
The Contract must, therefore, be construed as a whole. By including the inconsistency clause the parties have acknowledged that there may be some inconsistency. As Bingham LJ went on to hold (at 574):-
"... One should therefore approach the documents in a cool and objective spirit to see whether there is inconsistency or not. It is a
commonplace
of documentary construction that an apparently wide and absolute provision is subject to limitation, modification or qualification by other provisions. That does not make the later provisions inconsistent or repugnant. ..."
(1) The intention of the parties. A reasonable person in the position of these experienced parties would, in my view, have understood the Contract ordinarily to draw a distinction between Guaranteed Specifications and Typicals. The BP GTCs are often incorporated into sale contracts of this kind. Mercuria accepted that they were
commonly
used. Mercuria submitted that Onex had not pleaded that the incorporation of the BP GTCs was customary in this sort of sale contract and that it had therefore been prejudiced in being unable to lead evidence to address this point. I do not agree. Although their incorporation may not be customary, the BP GTCs are nevertheless well known in this industry, and are frequently used by sellers and buyers (including in The Nounou, where Males LJ observed at [30] that they were widely used). I find that both parties were in fact, and in any event should have been, aware of these terms.
(2) A practical approach. In my judgment the taking of a practical approach involves considering all of the terms in the Contract, that is to say both the special conditions and the BP GTCs.
(3) Do the printed terms deprive the special conditions of any effect? No, they do not. I consider that they do no more than supplement and, where necessary, explain or define the terms used in the special conditions. There is, in my judgment, no relevant inconsistency between the special conditions and the printed terms.
(4) Can the special conditions and the printed terms be read fairly and sensibly together? I consider that the special conditions and the printed terms both can, and indeed should, be read together. The Contract clearly shows which characteristics were guaranteed specifications and which were merely non-binding typicals.
a guarantee that the Organic Chloride content of the SRFO would not exceed 5ppm.
Was the Cargo "100% SOMO IRAQI HSSR"?
"... 100% SOMO IRAQI HSSR, TRACEABLE BY COO ISSUED AT KAZ AND INDIVIDUAL COO'S FOR SHUTTLES THAT MAKE UP THE FUJAIRAH PARCELS ..."
This 100% requirement has, in my view, nothing to do with quality requirements. The obligation is to deliver 100% of SOMO supplied HSSR of Iraqi origin. Mr Lewis submitted that this requirement should be regarded as one relating to the quality of the HSSR because it appears in a part of the contract which deals with quality. That may be so, but this does not alter the fact that the provision is dealing with the origin of the cargo and not its quality, save perhaps insofar as its origin can properly be regarded as part of its quality.
Was the Cargo SOMO BASRAH PIPELINE HIGH-SULPHUR SRFO?
commercial
identity by reason of the contamination.
commercial
identity as a result of the contamination. In a contract for a sale of unascertained goods by description, the description is "confined to those words in the contract which were intended by the parties to identify the kind of goods which were to be supplied": Ashington Piggeries v Christopher Hill [1972] AC 441, per Lord Diplock, at 503. The test for whether the goods supplied by the seller meet the contractual description is "whether the buyer could fairly and reasonably refuse to accept the physical goods proffered to him on the ground that their failure to correspond with that part of what was said about them in the contract makes them goods of a different kind from those he had agreed to buy": Ashington Piggeries, per Lord Diplock, at 503-504.
"... As regards substances which contain admixtures of other substances...the question is normally whether the admixture...is sufficiently significant to make the basic substance lose its identity from a
commercial
point of view. Goods may be subject to a defect which is
commercially
significant in the sense that it reduces their value in the market without suffering a change of description. Often the test employed is quantitative. But where the admixture makes the resultant substance toxic, quite a small amount of foreign matter may prevent the goods from conforming with description. Toxicity is nevertheless to some extent a relative notion, for substances may be poisonous to certain creatures and not to others, or in certain quantities and not in others. The extent to which a product should be regarded as toxic may therefore depend on the description under which it is sold, its normal use and so forth ..."
commercial
identity by reason of the contamination? It is not enough for the contamination simply to impact on their value. As Mustill J held in Gill & Duffus v Berger [1981] 2 Lloyd's Rep. 233 at 236, when deciding whether a contamination of Bolita beans resulted in a change of description:
"... The finding that the admixture was "
commercially
significant" is not enough for the purpose of the buyers' case under s. 13. Goods may well be subject to a defect which is
commercially
significant - in the sense, for example, that the defect makes them worth less in the market than they would otherwise be worth - without the goods necessarily suffering a change of description as a result ...
... What matters is not whether coloured beans are different from Argentine Bolita beans, but whether a consignment consisting principally of Argentine Bolita beans but admixed with the quantity of coloured beans which the arbitrators found to have been present, can or cannot still be described as a consignment of Argentine Bolita beans ..."
commercial
identity as SRFO? There is no dispute that the Cargo originated from Iraq and from SOMO or that it was high-sulphur and complied with its guaranteed specification. The only dispute between the parties was whether it was (or was only) SRFO.
commercial
identity as SRFO is the fact that the product in each of the Trafigura, Hartree and Buckeye on-sales (comprising about 93.53% of the Cargo) was, as I have set out above, described as Iraqi SRFO. This is to my mind clear evidence that the Cargo remained saleable as Iraqi SRFO. As the authorities I have cited above make clear, the mere fact that an admixture diminishes the value of the product (i.e. that it is "
commercially
significant") is not sufficient to demonstrate that it has thereby lost its
commercial
identity. The effect of the admixture may have been that the SRFO became an inferior SRFO. It did not, however, altogether destroy its
commercial
identity as SRFO.
Conclusions on Liability
Quantum and Mitigation
Quantum - the Parties' cases
(1) ought to have sold the Cargo at a discount to a refiner or trader in the US Gulf. Onex further contends that if Mercuria is entitled to the difference in value between the Iraqi SRFO and the Cargo then these should both be assessed on the date of the resale. Mercuria contends that sound value of the Cargo ought to be assessed on the date of rejection;
or
(2) that it should have blended the Cargo with other SRFO in order to reduce the Organic Chloride content to 5ppm or less and sold the Cargo as SRFO; and
(3) that Mercuria acted unreasonably in attempting to heat and purge the Cargo.
Resale: The appropriate measure of damages
"... 53. Remedy for breach of warranty
...
(2) The measure of damages for breach of warranty is the estimated loss directly and naturally resulting, in the ordinary course of events, from the breach of warranty.
(3) In the case of breach of warranty of quality such loss is prima facie the difference between the value of the goods at the time of delivery to the buyer and the value they would have had if they had fulfilled the warranty ..."
(1) The measure of loss in section 53(3) is only a prima facie rule, the purpose of which is to give effect to the underlying compensatory principle in section 53(2). It is "not an abstract and freestanding measure, to be applied for its own sake" and "it must give way to other methods where it does not effectively serve that purpose": Hirtenstein v Hill Dickinson LLP [2014]
EWHC
2711 (
Comm)
at [115], per Leggatt J; Chitty on Contracts (35th Ed., 2023) at 47-420.
(2) Consistently with the foregoing, there is no absolute rule that the value of the sound goods and the value of the defective goods must be taken at the same time. To the contrary, it may be appropriate to assess the value of the sound goods on one date and the value of the defective goods on a later date by reference to an actual sale: see Choil Trading SA v Sahara Energy Resources Ltd [2010]
EWHC
374 (
Comm)
in particular at [116], [123], [141] and [151]-[161], per Christopher Clarke J; BP Oil International Limited v Glencore Energy UK Limited [2022]
EWHC
499 (
Comm)
at [237], [255], [270], per Moulder J.
(4) The propositions in (2) and (3) above reflect the fact that the prima facie measure in section 53(3) is an application of the principle of mitigation: see Hirtenstein (above) at [117]. Section 53(3) gives effect to the underlying measure in section 53(2) by way of presumption that an injured party can reasonably be expected to mitigate its loss by immediately: (1) purchasing replacement sound goods in the market; and (2) recovering the value of the unsound goods by selling them: see Kramer on Damages (3rd Ed., 2022) at 4-31-4-33, 4-
130.
The presumption is displaced where either (1) or (2) do not reflect the mitigation that could be expected of a reasonable person in the innocent party's shoes.
The facts of the present case
(1) Onex's criticism that Mercuria failed to sell the Cargo "as is" as refinery feedstock is not made out. I am satisfied that this was not reasonably possible and that Mr von Schweinitz did take unsuccessful steps to propose a discount with Valero;
(2) It is
common ground that Mercuria cannot be criticised for not immediately downgrading the Cargo and selling it into the cracked fuel market;
(3) Mercuria's attempts to heat and purge the Cargo were not, in the circumstances, unreasonable. Mercuria was attempting to follow Onex's suggestion and advice. It may well have been that this heating and purging would have been unsuccessful in any event. It lies ill in Onex's mouth, however, to submit, as they did, that no reasonable trader would have attempted to heat and purge the Cargo in which Mercuria did;
(4) Reasonable attempts were made by Mercuria to investigate the blending of the Cargo with blendstock SRFO with a low content of Organic Chlorides. This was all done with the active encouragement of Onex;
(5) It was reasonable for Mercuria to decide to pivot away from blending the feedstock. There was no certainty about the quantities of blendstock that would have been needed to reduce Organic Chlorides to below 5ppm, or the cost of blending the Cargo, or the willingness of refiners to purchase blended oil at the end of the day;
(6) It was reasonable for Mercuria to sell the Cargo at the time, and for the prices, at which they did sell it.
Conclusion