Summary
A decision whether to split liability and quantum requires a pragmatic balancing exercise under the Civil Procedure Rules 1998. The court must assess costs, delay, evidential and witness overlap, trial complexity, the possibility of a clear division of issues, prejudice, settlement, and the risk of duplicate proceedings or appeals. The assessment is fact-specific and should not depend on a premature view of the merits.
A split will generally be inappropriate where causation and quantum evidence substantially overlaps with liability, the boundary between stages cannot be drawn cleanly, and a single trial can fairly and efficiently accommodate the issues. The overriding objective favours determining as many aspects of the claim as practicable on the same occasion.
Factual background
The claimants alleged infringements of competition law and sought an order that the quantum of their alleged loss be tried separately from liability and the remaining issues. The defendants opposed a split, contending that evidence relevant to causation and quantum would overlap with liability evidence and witnesses.
On 16 December 2011, the court had granted further amendments to the claimants’ pleadings and postponed the trial from May 2012 to January 2013. It deferred determination of the separate-trial application. The central issue was whether the interests of efficient and fair case management justified bifurcating the trial.
Held
Application dismissed. The court refused to direct a separate trial of quantum.
Under rule 3.1(2)(i), the discretion to order a separate trial must be exercised consistently with the overriding objective. The decision requires a practical balance of the likely costs and benefits of bifurcation. Relevant matters include the prospect of saving quantum costs if liability fails; additional cost and delay if liability succeeds; trial preparation and management; witness inconvenience; complexity; prejudice; the ability to define a clean division of issues; duplication; appellate consequences; and the effect on settlement.
Each case turns on its own features. The court should not make a case-management decision on a supposed assessment of the merits, since it cannot responsibly determine at that stage whether quantum will become live.
Clear demarcation between stages is important. The court accepted that liability issues were complex and that adding quantum would increase the burden of the trial. However, the trial date had already been moved, the range of claims was comparatively narrow, and quantum could be accommodated within the revised timetable.
Most importantly, the proposed division was unlikely to be neat. Causation could require evidence overlapping with liability, including evidence from the same witnesses. A split was therefore likely to generate further dispute, duplication, delay and a bifurcated appeal process. Requiring the parties to clarify the sums at stake might also assist mediation.
Taking those matters together, a single trial was more likely to further the overriding objective by determining as many aspects of the dispute as possible on the same occasion.
The court’s approach to earlier authorities
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Appellate history
This was a first-instance case-management decision. On 16 December 2011, the court granted the claimants permission to make further amendments and postponed the trial. It deferred this separate-trial application for later determination.
Key cases cited
2 authorities cited.
- Bookmakers' Afternoon Greyhound Services Ltd & Ors v Amalgamated Racing Ltd & Ors (No 2) [2008] EWHC 2688 (Ch)
- The Leaflet Company Ltd v Royal Mail Group Ltd [2009] UKCLR 323
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Cases citing this case
20 later cases · 19 positive · 1 caution
Most senior citing decisions:
- Various Claimants Listed in the Schedules to the Claim Forms v Entain Plc [2026] EWHC 1622 (KB) applied
- APK Communications & Ors v Vodafone Limited [2026] EWHC 811 (Comm) applied
- GS Woodland Court GP 1 Limited & Anor v RGCM Limited & Ors [2026] EWHC 351 (TCC) applied
- California State Teachers' Retirement System & Ors v Boohoo Group PLC [2026] EWHC 335 (Comm)
- Lee Castleton v Post Office Ltd & Anor [2026] EWHC 158 (Ch)
- IPJSC United Company Rusal v Whiteleave Holding Limited & Ors [2025] EWHC 1995 (Comm)
- Tatiana Soroka v Payne Hicks Beach (A Firm) [2025] EWHC 602 (Ch)
- Schneider Electric IT Corporation v Northamber PLC [2024] EWHC 2552 (Ch)
- Aabar Holdings SARL & Ors v Glencore PLC & Ors [2024] EWHC 1556 (Comm)
- Guy Carpenter and Company Limited & Ors. v Howden Group Holdings Limited & Ors. [2023] EWHC 1114 (KB)
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