(1) This rule applies--(a) to a defence of absolute privilege under Division 3 of Part 3 of the Defamation Act 1974 or under section 27 of the Defamation Act 2005 , and(b) to the defence of absolute privilege at common law.
(2) Without limiting rule 15.21, the particulars required by rule 15.1 for a defence of absolute privilege to which this rule applies must include particulars of the facts, matters and circumstances on which the defendant relies to establish that the imputation or matter complained of was published under absolute privilege.