The Civil Procedure Rules 1998

[F1Provisions applicable where two or more persons are jointly entitled to a remedyE+W

19.3(1) Where a claimant claims a remedy to which some other person is jointly entitled with him, all persons jointly entitled to the remedy must be parties unless the court orders otherwise.

(2) If any person does not agree to be a claimant, he must be made a defendant, unless the court orders otherwise.

(3) This rule does not apply in probate proceedings.]