(a) to state whether or not the addressee knows the identity of -
(ii) any person (whether a natural person or not) likely to have that knowledge, and
(b) if so, to supply any particulars of any such person that are within the addressee’s knowledge, and state whether or not the particulars are being supplied with the knowledge of each of the persons concerned.
(2) For the purposes of paragraph (1) -
(a) a reference to knowing the identity of a person includes a reference to knowing information from which that person can be identified, and
(b) a reference in subparagraph (b) of it to particulars is a reference -