21.—(1) For the purpose of determining whether to bring proceedings for an injunction under regulation 15, an enforcement authority may by notice in writing require a person to provide to it such information as may be specified or described in the notice or to produce to it any documents so specified or described.
(2) A notice under paragraph (1) may—
(a)specify the way in which and the time within which it is to be complied with; and
(b)be varied or revoked by a subsequent notice.
(3) Nothing in this regulation gives an enforcement authority any power to require another person to provide or produce any information or document which the other person would be entitled to refuse to provide or produce in proceedings in the High Court on the grounds of legal professional privilege or (in Scotland) in proceedings in the Court of Session on the grounds of confidentiality of communications.
(4) In paragraph (3) “communications” means—
(a)communications between a professional legal adviser and his client; or
(b)communications made in connection with or in contemplation of legal proceedings and for the purposes of those proceedings.
(5) Nothing in this regulation shall be construed as requiring a person to provide information if to do so might incriminate him.
(6) If a person does not comply with a notice under paragraph (1) the court may, on the application of an enforcement authority, make such order as the court thinks fit for requiring the default to be made good, and any such order may provide that all the costs or expenses of and incidental to the application shall be borne by the person in default or by any officers of a company or other association who are responsible for its default.