Details of the Apache main operating units can be found here:-

British Apaches can be seen at numerous locations in the UK and elsewhere:-

Mesa, Arizona Boeing Rotorcraft manufactures all Apaches here. The first 8 Army Air Corps aircraft were completed here, whilst the remaining 59 fuselage kits were assembled here before being air freighted to Yeovil.
Yeovil, Somerset Agusta-Westland have the UKs only helicopter manufacturing facility in the West of town. Apache fuselage kits shipped here from Mesa were completed and flight-tested
Boscombe Down, Wiltshire QinetiQ carry out testing and evaluation of all UK military aircraft at this location
Middle Wallop, Hampshire This is the School of Army Aviation where all prospective Apache aircrew undergo type conversion
Dishforth, North Yorkshire 9 Regiment had 2 squadrons that were initially located here before moving to Wattisham to join the rest of the frontline Apache units
Wattisham, Suffolk 3 and 4 Regiments Army Air Corps each have 2 squadrons of Apaches under the command of 16 Air Assault Brigade. One of the squadrons is dual-tasked in an amphibious support role, whilst 7 Air Assault Battalion REME undertake minor servicings and field servicing tasks
Netheravon, Wiltshire Apache training and operations are conducted from here as required
 Shawbury, Shropshire New built aircraft were stored here prior to delivery to the AAC. A Westlands facility here also prepared aircraft for service