8. The investigating officer must, as soon as is reasonably practicable (but without prejudicing his or any other investigation of the matter), cause the member concerned to be given written notice, stating—
(a)that there is to be an investigation into the case,
(b)the nature of the report, complaint or allegation,
(c)that he is not obliged to say anything concerning the matter, but that if he wishes to do so he may make a written or oral statement concerning the matter to the investigating officer or the appropriate officer,
(d)that if he makes such a statement it may be used in any subsequent proceedings under these Regulations,
(e)that he has the right to seek advice from the Defence Police Federation, and
(f)that he has the right to be accompanied by a member of the force who is not an interested party to any meeting, interview or hearing.