Every prisoner shall be deemed to be in the legal custody of the governor of the prison.

A prisoner shall be deemed to be in legal custody while he is confined in, or is being taken to or from, any prison and while he is working, or is for any other reason, outside the prison in the custody or under the control of an officer of the prison F1and while he is being taken to any place to which he is required or authorised by or under this Act F2or section 95, 98, 99 or 108(5) of the Powers of Criminal Courts (Sentencing) Act 2000F3or section 271, 276 or 329 of the Sentencing Code to be taken, or is kept in custody in pursuance of any such requirement or authorisation.