20 Battery Royal Artillery is the headquarters battery of the 16th Regiment Royal Artillery. It is one of the five batteries that make up 16 Regiment Royal Artillery. The Regiment use the Rapier Field Standard C air defence missile system and the Land Environment Air Picture Provision (LEAPP) capability, the only Regiment in the British Armed Forces to do so. The unit has since served in Iraq, Afghanistan, Sierra Leone and the Falkland Islands. However, in 2012, the Battery was redesignated a Headquarters Battery, and does no longer deploy with guns or missiles.