Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Hawker Siddeley Andover is a twin engined turboprop military transport aircraft produced by Hawker Siddeley for the Royal Air Force developed from the Avro-designed HS 748 airliner. The Andover was named after the Avro Andover, a Royal Air Force biplane transport used for medical evacuation between the wars, and RAF Andover, where trials of the aircraft were partially carried out.