A person required to be detained under an interim custody order or a detention order may be detained in a prison or in some other place approved for the purposes of this paragraph by the Secretary of State.

A person for the time being having custody of a person required to be detained as aforesaid shall have all the powers, authorities, protection and privileges of a constable.

Subject to any directions of the Secretary of State, a person required to be detained as aforesaid shall be treated as nearly as may be as if he were a prisoner detained in a prison on remand and any power of temporary removal for judicial, medical or other purposes shall apply accordingly.

A person required to be detained as aforesaid who is unlawfully at large may be arrested without warrant by any constable or any member of Her Majesty’s forces on duty.