Collective Litigation: A Practical Guide

Collective litigation is rapidly reshaping the disputes landscape, driven by claimant innovation, third-party funding, and an increasingly receptive procedural framework. This practical guide, authored by leading practitioners at Charles Lyndon, a law firm at the heart of this innovation and involved in many of the leading cases, provide a comprehensive and authoritative roadmap through every stage of mass claims from inception and claimant recruitment to trial, settlement and redress. The book equips practitioners with the insight needed to navigate complex, high-value, and novel disputes.

Key insights include:

• Comprehensive overview of collective litigation in the UK, including Group Litigation Orders, representative actions under CPR Part 19, and Competition Appeal Tribunal collective proceedings
• Practical guidance for practitioners on how collective actions operate in England & Wales, with comparative insights into Scotland’s emerging regime and the position in Northern Ireland
• In-depth discussion of landmark and high-profile collective actions, including the Post Office Horizon litigation, the Merricks v Mastercard proceedings, and the Boundary Fares rail litigation
• Coverage of the latest case law and procedural developments up to 2026, including recent Competition Appeal Tribunal decisions and judicial interpretation of collective proceedings
• Insight into the rapidly evolving litigation funding market, including the Civil Justice Council’s 2025 Review of Litigation Funding and proposals for future regulation.
• Analysis of the UK Government’s 2025 review of the opt-out collective actions regime, including debates surrounding funding transparency, certification, damages distribution, and consumer redress
• Practical examples illustrating how courts manage complex, high-value, and technically demanding claims involving millions of claimants or consumers.

The rise of mass claims touches multiple practice areas. This guide distils the procedural rules, strategic considerations and economic drivers underpinning collective actions and provides an indispensable resource for both practitioners seeking to stay current in a fast-evolving market, increasingly defined by scale.