United Kingdom of Great Britain and Northern Ireland
Practice Relating to Rule 79. Weapons Primarily Injuring by Non-Detectable Fragments
The UK Military Manual (1958) prohibits the use of projectiles filled with broken glass.
The UK LOAC Pamphlet (1981), under the heading “Future Developments”, considers the possibility, thanks to the 1980 Convention on Certain Conventional Weapons, of “a ban on weapons whose main purpose is to produce fragments that cannot be detected by X-ray”.
The UK LOAC Manual (2004) states in its chapter on weapons:
6.11. The general rule prohibiting the infliction of unnecessary suffering or superfluous injury does not preclude the use of hand-grenades and other fragmentation weapons.
6.11.1. The general rule must be taken as banning the use of weapons or projectiles that discharge broken glass, nails, and the like.
6.11.2. The use of “any weapon the primary effect of which is to injure by fragments which in the human body escape detection by X-rays” is prohibited.