Jurisdiction(s):
United Kingdom

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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...

Inadequate or unreasoned arbitral awards: corrections under s57, serious irregularity under s68(2)(h), and court-directed reasons under s70(4) (Arbitration Act 1996, England, Wales and Northern Ireland)

Published by a LexisNexis Arbitration expert

Practice notes

Unless the parties agree otherwise, or an agreed award is issued, an arbitral award should set out its reasons. An arbitrator’s obligation to explain the decision is as exacting as that of a judge in court (Compton Beauchamp Estates v Spence). In ABB AG v Hochtief Airport, the court advised that plainly expressed reasons, addressing the issues as argued before the tribunal, will evidently curtail the scope for unmeritorious challenges...

Application to the tribunal for correction

If reasons are absent or insufficient, a party may write to the tribunal seeking correction of the award under the slip rule (section 57 of the Arbitration Act 1996 (AA 1996))—see Practice Note: AA 1996—inadequate award—correcting mistakes or errors in an arbitral award (s 57). The slip rule exists to permit the tribunal to rectify clerical mistakes or errors, or to remove any ambiguity in the award; it does not expressly provide for the giving of reasons...

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Web page updated on 21/05/2026

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