A person under the supervision of a member of the armed forces may, without holding a certificate or obtaining the authority of the Secretary of State under section 5 of the principal Act, have in his possession a firearm and ammunition on service premises.

Subsection (1) above does not apply to a person while engaged in providing security protection on service premises.

In this section—

• “armed forces” means any of the naval, military or air forces of Her Majesty; and

• “service premises” means premises, including any ship or aircraft, used for any purpose of the armed forces.