The General Dynamics F-111K was a planned variant of the General Dynamics F-111 Aardvark medium-range interdictor and tactical strike aircraft by General Dynamics, to meet a requirement for such an aircraft for the Royal Air Force. The project was initiated in 1965 following the cancellation of the BAC TSR-2 strike aircraft. The aircraft was planned as a hybrid of several variants of the F-111 as a way of producing an aircraft for the specific needs of the United Kingdom. A RAF order for 50 aircraft, made in 1967, was cancelled a year later.