Commercial Arbitration UK: How It Works (2026)

Overview

Commercial arbitration is a private method of settling business disputes where the parties appoint one or more arbitrators to hear the matter and issue a binding decision known as an award. It sits within the wider family of Alternative Dispute Resolution, but differs from mediation in one important way: the arbitrator decides the outcome, rather than helping the parties negotiate their own.

In England and Wales, the process is governed primarily by the Arbitration Act 1996, which sets out the framework for arbitrations seated in this jurisdiction. The parties agree to arbitrate either in advance through a clause in their contract, or after a dispute has arisen through a separate submission agreement.

Once the award is issued, it is final and can be enforced through the courts if the losing party fails to comply. Thanks to the New York Convention, awards made in the UK can also be enforced in over 170 countries, which explains why arbitration is so common in cross-border trade.

Key steps

1. Check the arbitration clause. Before anything else, look at the contract. A well-drafted arbitration clause will specify the seat, the governing law, the number of arbitrators, the institutional rules (for example LCIA or ICC), and the language of the proceedings. These choices shape how the whole process will run, so read them carefully.
2. Serve a notice of arbitration. The claimant begins by sending a written notice to the other side, setting out the nature of the dispute, the relief sought, and the basis for arbitration. The exact requirements depend on the rules you have chosen, but the notice formally starts the clock running on the process.
3. Appoint the tribunal. The parties then select the arbitrator or arbitrators. A sole arbitrator is common for smaller disputes, while a panel of three is typical for larger matters. If the parties cannot agree, the institution named in the clause, or the court, will appoint on their behalf under the Arbitration Act.
4. Exchange written submissions and evidence. Each side files a statement of case setting out its position, supported by documents, witness statements, and where needed, expert reports. The tribunal will issue procedural directions covering disclosure, timelines, and how the hearing will be conducted. This stage usually takes several months.
5. Attend the hearing and receive the award. The tribunal holds a hearing where lawyers present arguments and witnesses give evidence. After considering everything, the arbitrators issue a written award with reasons. The award is binding, and challenges are limited to narrow grounds such as serious irregularity or lack of jurisdiction.

Common questions