Related Rule
United Kingdom of Great Britain and Northern Ireland
Practice Relating to Rule 8. Definition of Military Objectives
Section C. Places where armed forces or their materiel are located
The UK LOAC Pamphlet (1981) states that military objectives include “buildings”. 
United Kingdom, The Law of Armed Conflict, D/DAT/13/35/66, Army Code 71130 (Revised 1981), Ministry of Defence, prepared under the Direction of The Chief of the General Staff, 1981, Section 4, p. 13, § 3(b)(2).
The UK LOAC Manual (2004) states: “The term ‘military objective’ includes combatant members of the enemy armed forces and their military weapons, vehicles, equipment and installations.” 
United Kingdom, The Manual of the Law of Armed Conflict, Ministry of Defence, 1 July 2004, § 5.4.1.
In 1991, in a report submitted to the UN Security Council on operations in the Gulf War, the United Kingdom listed ammunition storage depots among the targets the Royal Air Force had attacked. 
United Kingdom, Letter dated 13 February 1991 to the President of the UN Security Council, UN Doc. S/22218, 13 February 1991, p. 1.