206 Test and Evaluation Squadron is based at RAF Brize Norton, testing and evaluating UK Defence heavy aircraft, such as the Atlas A400M. They flew anti-submarine patrols throughout World War Two. After a brief period as a transport unit, 206 Squadron returned to maritime flying in 1952. Former aircraft include the Avro Anson, Boeing Fortress, Avro Shackleton, Hawker Siddeley Nimrod and Hercules. 206 Squadron moved to RAF Brize Norton in 2014, alongside the RAF tanker and transport fleet.