s 26 Custody
(1) A prisoner— (a) confined in a prison shall be deemed to be in the lawful custody of the Officer in Charge of the prison; (b) shall be subject to prison discipline and to all written laws relating to prisons or prisoners and to the Commissioner General’s Standing Orders during the period of his imprisonment, whether or not he is within the precincts of a prison; and (c) while in the custody or under the control of a prison officer— (i) when being taken to or from a prison; (ii) whenever he is working outside a prison; or (iii) is otherwise beyond the limits of the prison, shall be deemed to be in prison and shall be subject to all the same incidents as if he were actually in prison. (2) Where a prisoner has escaped from lawful custody, the period during which he is at large shall not be reckoned as part of the sentence he was undergoing at the time of his escape.