15. An authorised person may—
(a)require a claimant or any officer, employee, servant or agent of a claimant to produce any claimant’s document in his possession or under his control and to supply such additional information in that person’s possession or under his control relating to a claim as the authorised person may reasonably request;
(b)examine any claimant’s document referred to in sub-paragraph (a) and, where it is kept by means of a computer, have access to, and inspect and check the operation of, any computer and any associated apparatus or material which is or has been used in connection with that claimant’s document;
(c)make such copies of any claimant’s document referred to in sub-paragraph (a) as he may think fit; and
(d)seize and retain any claimant’s document referred to in sub-paragraph (a) which he has reason to believe may be required as evidence in proceedings under these Regulations and, where any such claimant’s document is kept by means of a computer, require it to be produced in a form in which it may be taken away.