The AS-90 ("Artillery System for the 1990s"), known officially as Gun Equipment 155 mm L131, is an armoured self-propelled artillery weapon used by the British Army. AS-90 was designed and built by the Armaments division of Vickers Shipbuilding and Engineering, VSEL provided 179 vehicles between 1992 and 1995 at a cost of £300 million . The AS-90 was first deployed by the British Army in 1993. The AS-90s were acquired to re-equip six of the eight self-propelled field artillery regiments (each of 24 guns) in the I (BR) Corps, replacing the 105 mm FV433 Abbot SPG and older M109 155 mm Self Propelled Gun and FH70 towed howitzer.
It remains in UK service and will equip three field regiments supporting armoured infantry brigades for the foreseeable future. 134 were in service in 2008, reduced to 117 in 2015. The AS-90 underwent a capability enhancement program in 2008 and 2009, primarily relating to upgrades of the AS-90's electronic system.The initial expected out-of-service date for the AS-90 was 2030, but this was later delayed to 2032, with a replacement planned to enter service in 2029