Date of Judgment

28 October 2026

Court

UK Supreme Court

Legal Issue

The Supreme Court considered whether Spain and France could be ordered to pay damages for pursuing court proceedings in breach of an agreement to arbitrate.

The key question was whether that obligation was contractual, which would attract common-law damages, or equitable (a breach of trust), which would attract equitable compensation. 

Development

The dispute arose from the sinking of the oil tanker Prestige in 2002, which caused extensive pollution along the Spanish and French coastlines. The London Steam‑Ship Owners’ Mutual Insurance Association (the “Club”) had insured the vessel under a policy containing a London arbitration clause and a “pay to be paid” condition.

Earlier proceedings established that, by seeking to enforce rights derived from the insurance policy, Spain and France were bound by its arbitration clause. This was based on the conditional benefit principle, which means a party cannot take the benefit of a contract without also accepting the obligations attached to that benefit.

Despite this, Spain and France continued proceedings before the Spanish courts and obtained judgments quantifying substantial liabilities against the insurer.

The Club subsequently commenced London arbitrations, arguing that the States had breached their obligation to arbitrate. The arbitral tribunal awarded both declaratory relief and monetary compensation.

The Court of Appeal later set aside the monetary awards, finding that equitable compensation (a remedy developed by courts of equity rather than traditional contract law) was not available in the circumstances. The Club appealed to the Supreme Court.

Analysis

The Supreme Court unanimously allowed the Club’s appeal. 

It held that the States’ obligation to arbitrate was contractual in substance rather than equitable. Although Spain and France were not original parties to the insurance contract, they sought to enforce rights arising under it and therefore required to comply with the arbitration clause attached to those rights.

Because the obligation was contractual, the appropriate remedy was common‑law damages for breach of contract, rather than equitable compensation. The Court therefore reinstated the monetary awards, subject to amendments clarifying their legal basis.

The Court also drew an important distinction between:

  • losses arising from breaches that had already occurred
  • losses that might arise from future breaches.

A tribunal cannot award damages for a breach that has not yet happened. However, it may make a conditional award for future losses stemming from an existing breach, if those losses are later materialised.

This distinction ensures that damages remain compensatory rather than speculative.

Why It Matters

The decision reinforces the principle that parties cannot avoid arbitration obligations simply by relying on rights obtained through another person's contract.

For insurers, businesses and governments involved in cross‑border disputes, the judgment confirms that arbitration agreements can have real consequences even where a party was not an original signatory.

The ruling also clarifies the remedies available when arbitration agreements are breached. The distinction between contractual damages and equitable compensation is significant because it affects the legal basis, scope and limits of any monetary award.

For international commercial disputes, the judgment provides greater certainty regarding the enforcement of arbitration agreements and the recovery of losses caused by proceedings being brought in the wrong forum.

This case also highlights the continuing importance of carefully drafted arbitration clauses in insurance and other international commercial contracts.

Future Outlook

This decision strengthens the position of arbitration clauses in international commercial disputes and signals that courts are willing to award contractual damages where parties attempt to bypass agreed dispute‑resolution mechanisms.

As cross‑border litigation becomes increasingly common, states, insurers and commercial parties may face greater scrutiny when pursuing claims outside an agreed arbitral forum. The judgment is also likely to influence future disputes involving third‑party rights, reinforcing the principle that parties cannot enjoy the benefits of a contract without accepting its associated obligations.