28.—(1) Every detained person may receive as many visits as he wishes within such reasonable limits and subject to such reasonable conditions as the Secretary of State may direct, either generally or in a particular case.
(2) In the interests of security and safety, every visit to a detained person shall take place within sight of an officer, unless the Secretary of State otherwise directs.
(3) Every visit to a detained person shall take place out of the hearing of an officer unless the Secretary of State otherwise directs in a particular case in the interests of security or safety (in which case the detained person shall be given reasons for the direction in advance).
(4) No person visiting a detained person at a detention centre shall be permitted to take a photograph whilst there without the permission of the Secretary of State.