The General Dynamics F-111K was a planned variant of the General Dynamics F-111 Aardvark medium-range interdictor and tactical strike aircraft, developed by General Dynamics to meet a requirement for such an aircraft for the Royal Air Force. 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. The project was initiated in 1965 following the cancellation of the BAC TSR-2 strike aircraft, with 50 units ordered in 1967, only for the order to be subsequently cancelled a year later.