Civil Liability and Courts Act 2004
Exclusion of certain witnesses, etc.
54.—(1) The court in a personal injuries action may, upon the application of a party to the action, direct that a person (other than another party to the action or an expert witness) who it is intended will be called to give evidence at the trial of the action shall not attend that trial until he or she is called to give evidence.
(2) Where a court gives a direction under subsection (1), it may give all such other directions as it considers necessary or expedient to secure that a witness to whom the first-mentioned direction applies does not—
(a) communicate with other witnesses who it is intended will be called to give evidence at the trial of the action concerned, or
(b) receive information such as might influence him or her when giving evidence.
(3) In this section “expert witness” means, in relation to a personal injuries action, a person who it is intended will be called as a witness to give expert evidence at the trial of that action.