No. 55 Squadron is a squadron of the Royal Air Force. It was formed in 1916 at Castle Bromwich as a unit of the Royal Flying Corps. No. 55 Squadron was the last RAF Squadron to operationally fly the Handley Page Victor, in its Victor K.2 in-flight refuelling tanker role. It was subsequently a navigator training squadron based at RAF Cranwell in Lincolnshire. The squadron operated the Hawker Siddeley Dominie, a military version of the HS.125 business jet, until January 2011.