Sch 15 para 3
(1) A person is within this paragraph if— (a) he is in service custody; and (b) his being in service custody is lawful by virtue of any provision of or made under this Act. (2) A person is also within this paragraph if he is in the course of being arrested, or of having an attempted arrest made of him, by a person who has a duty under service law to apprehend him.