Skatteforvaltningen (The Danish Customs and Tax Administration) v MCML Ltd (previously known as ED&F Man Capital Markets Ltd)

Issue estoppel arises only from an issue that was necessary and fundamental to the earlier decision. It attaches to the immediate legal foundation of that decision: the ultimate facts and the legal quality of those facts that were traversable on the pleaded claim or defence.

It does not extend to wider judicial reasoning, abstract legal propositions, collateral findings or issues inferred from the judgment. Nor does it extend from one factual situation to another merely because the difference would not have altered the earlier result. Its narrow operation preserves the distinct roles of issue estoppel, precedent and abuse of process.

SKAT’s 2018 Proceedings against EDFM concerned alleged negligent misrepresentations in tax vouchers used to obtain Danish withholding-tax refunds. Andrew Baker J dismissed the claim under the Revenue Rule. The 2022 Claim concerned the same and five additional vouchers, but alleged fraudulent rather than negligent misrepresentations.

Bright J dismissed EDFM’s abuse-of-process and issue-estoppel objections in [2024] EWHC 148 (Comm). The Court of Appeal agreed that there was no abuse of process but held, by a majority, that the 2022 Claim was barred by issue estoppel in [2025] EWCA Civ 371; [2025] 4 WLR 52. The central question was whether the earlier decision created an estoppel extending beyond the particular pleaded facts and claim.

Appeal allowed unanimously. The 2022 Claim should not have been dismissed on the basis of issue estoppel. It was unnecessary to determine the proposed special-circumstances exception.

1. Nature and limits of issue estoppel. Issue estoppel has a powerful effect because it may prevent a party from pursuing an otherwise good claim or defence. It must therefore remain within narrow limits. Its scope is not as wide as the doctrine of precedent and must not be expanded so as to displace the flexible doctrine of abuse of process.
2. Necessary and fundamental issue. The prior issue must have been necessary and fundamental to the decision. It must form the immediate legal foundation of the judgment and be identified by reference to the pleaded claim or defence. Subsidiary reasoning, collateral matters and evidentiary findings do not create an estoppel. The scope cannot be enlarged by inference, deduction or argument from the prior judgment. New Brunswick Railway Co v British and French Trust Corporation Ltd [1939] AC 1 provided valuable guidance and was not confined to default judgments.
3. Application. The 2018 Claim alleged negligent misrepresentations. The 2022 Claim alleged fraudulent misrepresentations. Their factual and legal bases were different, and the fraud allegations were not traversable in the 2018 Proceedings. Andrew Baker J decided only whether the 2018 claim, as alleged, fell within the Revenue Rule. The broader issue formulated by the Court of Appeal was not the immediate foundation of that decision. It could not be extended to the different facts of the 2022 Claim, including the five new vouchers.
4. Authorities. Watt (formerly Carter) v Ahsan [2008] AC 696 involved the legal quality of the same established facts and did not support a wider estoppel. The court also confirmed that the modern law treats issue estoppel as a form of estoppel by record. The observation that the special-circumstances exception in Arnold v National Westminster Bank plc [1991] 2 AC 93 is narrow was obiter, since Ground 3 did not require determination.

1. United Kingdom Supreme Court — Appeal allowed. The 2022 Claim was not barred by issue estoppel.
2. Court of Appeal — In [2025] EWCA Civ 371; [2025] 4 WLR 52, the majority held that the 2022 Claim was barred by issue estoppel, while all members agreed that it was not an abuse of process.
3. Commercial Court — In [2024] EWHC 148 (Comm), Bright J held that no issue estoppel arose and that the 2022 Claim was not an abuse of process.