Res judicata and Henderson abuse

Published by a LexisNexis Dispute Resolution expert
Practice notes

Res judicata and Henderson abuse

Published by a LexisNexis Dispute Resolution expert

Practice notes
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There is a degree of overlap between the doctrine of res judicata and the principle of Henderson abuse, as considered below.

Note also that these two concepts also overlap with the procedural basis for striking out a claim as an abuse of the court’s process under CPR 3.4(2)(b), see below and Practice Note: Strike out for abuse of process (civil) (CPR 3.4(2)(b))—Abuse of process by second proceedings.

What is res judicata?

A res judicata is a decision given by a judge or tribunal with jurisdiction over the cause of action and the parties which disposes, with finality, of a matter decided so that it cannot be re-litigated by those bound by the judgment, except on appeal.

For further guidance on the purpose of and when you can establish a res judicata, see Practice Notes:

  1. The doctrine of res judicata

  2. Key requirements to establish a res judicata

What is Henderson abuse?

In a legal context abuse of process occurs where the court’s process is used for a purpose or in a way

Jack Mitchell
Jack Mitchell

Barrister, Old Square Chambers


Jack Mitchell specialises only in employment law and advises on the entire spectrum of claims, but is best known for work on whistleblowing and discrimination claims. He advises on the commercial aspects of employment, providing advice to both corporate and individual clients on a broad range of commercial matters including breach of contract claims, shareholder disputes and partnership issues.
He is regularly instructed in large complex claims in all areas of employment law, from Tribunals to High Court claims and appeals at all levels.
Jack has been elected to ELBA (Employment Law Bar Association) and has been appointed its Treasurer.
 
Other publications:
Whistleblowing: Law and Practice
Fourth Edition (2022), Third Edition (2017), Second (2012) and First (2007), with Jeremy Lewis KC, John Bowers KC and Martin Fodder.
Published by Oxford University Press (This should include an outline of the most important points of your career. It should not exceed 250 words in length.) 

Emily Skinner
Emily Skinner

Barrister, Old Square Chambers


Emily is an expert in employment law having practised as an employment-specialist solicitor at an international City law firm before transferring to the Bar and joining Old Square Chambers in 2021.

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Jurisdiction(s):
United Kingdom
Key definition:
Res judicata definition
What does Res judicata mean?

Latin for the matter has been decided. At common law, once a court has made a decision, the matter cannot be re-opened once the time limit for appealing or the relevant limitation period has expired.

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