A postal packet addressed to any person by a patient detained in a hospital under this Act and delivered by the patient for dispatch may be withheld from the postal operator concerned—
and any request for the purposes of paragraph (a) above shall be made by a notice in writing given to the managers of the hospital, or the approved clinician with overall responsibility for the patient's case ... .
Subject to subsection (3) below, a postal packet addressed to a patient detained under this Act in a hospital at which high security psychiatric services are provided may be withheld from the patient if, in the opinion of the managers of the hospital, it is necessary to do so in the interests of the safety of the patient or for the protection of other persons.
Subsections (1)(b) and (2) above do not apply to any postal packet addressed by a patient to, or sent to a patient by or on behalf of—
In subsection (3) above—
The managers of a hospital may inspect and open any postal packet for the purposes of determining—
and the power to withhold a postal packet under either of those subsections includes power to withhold anything contained in it.
Where a postal packet or anything contained in it is withheld under subsection (1) or (2) above the managers of the hospital shall record that fact in writing.
Where a postal packet or anything contained in it is withheld under subsection (1)(b) or (2) above the managers of the hospital shall within seven days give notice of that fact to the patient and, in the case of a packet withheld under subsection (2) above, to the person (if known) by whom the postal packet was sent; and any such notice shall be given in writing and shall contain a statement of the effect of section 134A(1) to (4).
The functions of the managers of a hospital under this section shall be discharged on their behalf by a person on the staff of the hospital appointed by them for that purpose and different persons may be appointed to discharge different functions.
The Secretary of State may make regulations with respect to the exercise of the powers conferred by this section.
In this section and section 134A "hospital" has the same meaning as in Part II of this Act and "postal operator" and, "postal packet" have the same meaning as in Part 3 of the Postal Services Act 2011 (see section 27)