reg 9 Subsistence allowances to witnesses, other than professional or expert, and to others
(1) Any of the persons mentioned in paragraph (3) below who attends court or elsewhere shall be entitled to a day subsistence allowance of the relevant amount or, if his attendance makes it necessary for him to stay overnight away from home, to an overnight subsistence allowance of the relevant amount for each night of absence. (2) An overnight subsistence allowance under paragraph (1) above shall be in respect of a period of 24 hours and a witness who receives such an allowance shall be entitled to a further allowance in respect of any period in excess of 24 hours which is not covered by such an allowance at the rate appropriate to a day subsistence allowance under that paragraph. (3) The persons referred to under paragraph (1) above are — (a) a witness who attends to give evidence (other than professional or expert evidence); and (b) any other person who, in the opinion of the appropriate officer, necessarily attends for the purpose of the prosecution case otherwise than to give evidence (excluding an interpreter).