Civil Jurisdiction and Judgments Act 1982

34 Certain judgments a bar to further proceedings on the same cause of action.U.K.

No proceedings may be brought by a person in England and Wales or Northern Ireland on a cause of action in respect of which a judgment has been given in his favour in proceedings between the same parties, or their privies, in a court in another part of the United Kingdom or in a court of an overseas country, unless that judgment is not enforceable or entitled to recognition in England and Wales or, as the case may be, in Northern Ireland.