The Hawker Siddeley Andover is a twin-engine turboprop aircraft designed and produced by Hawker Siddeley for military transport. The purpose-driven aircraft was designed for the Royal Air Force (RAF) of the United Kingdom. Derived and developed from the Avro-designed HS 748, a 40- to 48-seat passenger airliner, the Hawker Siddeley HS 780 Andover was built for the British Royal Air Force.