Evidence – Witness summons and witness summary issued by a party for an opposing party – Validity of witness summons – Application to strike out witness summary – Application to strike out portions of the claimants’ statement of case on the basis that it is a collateral attack on a previous decision of the privy council – Civil Procedure Rules, rules 29.6 (3), 33.2, 33.3(4) and 33.3(5)