Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Slip rule definition

What does Slip rule mean? Slip rule describes the limited power to correct accidental slips or clerical mistakes in a judgment, order, award or adjudication decision—such as typographical, transcription or arithmetic errors—so the written outcome reflects the decision-maker’s original intention. It does not permit a change of mind, new reasoning, or a substantive re‑determination. In court proceedings this power is rule-based (for example, CPR 40.12 in England and Wales, with equivalent provisions in Scotland and Northern Ireland, and Order 28 rule 11 of the Irish Rules of the Superior Courts). Similar “slip” powers exist in arbitration (e.g. under the Arbitration Act 1996) and across tribunals. In...

Arbitration Act 1996 s 57: correction, clarification and additional awards; procedure, deadlines and court extensions; LCIA parallels, section 68 challenges and 2025 Act time recalculation

Published by a LexisNexis Arbitration expert

Practice notes

Correction of an arbitral award under AA 1996

Once an award is delivered, parties and their solicitors should review it meticulously to identify any mistakes arising from an accidental slip or omission, or any ambiguity that ought to be clarified or removed. Naturally, they will also be looking for substantive errors that might ground a challenge or an appeal, but they must also ensure the tribunal is given the chance to address any error capable of correction under the ‘Slip rule’ in section 57 of the Arbitration Act 1996 (AA 1996). That rule operates as an exception to the position that the tribunal is Functus officio once it has given its award—meaning it no longer has power or Authority over the arbitration (eg H v W)...

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Richard Bamforth

CMS

Richard is Head of the International Litigation Practice Group and a member of the International Arbitration Group at CMS. Richard specialises in international commercial arbitration, commercial litigation and alternative dispute resolution, with a focus on cross border disputes in the media, banking, finance, insolvency, energy and telecommunications sectors. He has represented clients in arbitrations conducted under all the major institutional rules (ICC, LCIA, UNCITRAL) and other ad hoc arbitrations. He also sits as an arbitrator, appointed direct by parties and by the arbitral institutions, and is accredited as a mediator by the Centre for Effective Dispute Resolution (CEDR). Richard is recommended for International Arbitration in Chambers & Partners 2015 (where he is described as having a 'full perspective on the arbitration space') and in Legal 500 2014. ...

Maxie Chopard

CMS Cameron McKenna Nabarro Olswang LLP

Maxie works closely with her clients to manage and resolve complex, multi-jurisdictional disputes. She has acted for clients in the life sciences and pharmaceutical, technology, media and telecommunications, and energy and construction sectors both in High Court litigation and under the rules of major arbitral institutions. She regularly undertakes pro bono work, providing legal advice through the Islington Law Centre on consumer law, housing and employment matters. ...

Sarojah Sathivelu

CMS Cameron McKenna Nabarro Olswang LLP

Sarojah is an associate in the CMS Litigation & Arbitration team. Sarojah’s work involves broad range of practice areas, including media and reputation management, competition claims, arbitral disputes and fraud. ...

Web page updated on 21/05/2026

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