Number 55 Squadron was a flying squadron of the Royal Air Force (RAF). First formed in April 1917, the squadron saw action on the Western Front during the First World War. Based in the Middle East during the interwar period and the Second World War, No. 55 Squadron saw action over Iraq, Egypt, Libya and Italy. Between 1960 and 1993, the unit flew the Handley Page Victor. Initially on the Victor B.1A before becoming a tanker squadron in 1965 with the Victor B(K).1A/K.1/K.1A before converting to the Victor K.2 in 1975. Disbanding in October 1993, No. 55 Squadron were the last RAF unit to operate the Victor. Between 1996 and 2011, No. 55(Reserve) Squadron operated the Hawker Siddeley Dominie T.1 from RAF Cranwell, Lincolnshire, helping to train navigators for the RAF.

The Handley Page Victor is a British jet-powered strategic bomber developed and produced by Handley Page during the Cold War. It was the third and final V bomber to be operated by the Royal Air Force (RAF), the other two being the Vickers Valiant and the Avro Vulcan. Entering service in 1958, the Victor was initially developed as part of the United Kingdom's airborne nuclear deterrent, but it was retired from the nuclear mission in 1968, following the discovery of fatigue cracks which had been exacerbated by the RAF's adoption of a low-altitude flight profile to avoid interception, and due to the pending introduction of the Royal Navy's submarine-launched Polaris missiles in 1969.