The English Electric Lightning is a supersonic fighter aircraft of the Cold War era. It was designed, developed, and manufactured by English Electric, which was subsequently absorbed by the newly formed British Aircraft Corporation. It was then marketed as the BAC Lightning. The Lightning was the only all-British Mach 2 fighter aircraft. The Lightning was used by the Royal Air Force (RAF) and the Royal Saudi Air Force (RSAF). Although it was the RAF's primary interceptor for more than two decades it was never required to attack another aircraft.

The Lightning is powered by two Rolls-Royce Avon turbojet engines in a unique staggered stacked installation in the fuselage. The Lightning was developed to intercept increasingly capable bomber aircraft (Tupolev Tu-16, Tupolev Tu-22, Tupolev Tu-95), and thus has exceptional rate of climb, ceiling, and speed; pilots have described flying it as "being saddled to a skyrocket". This performance made the Lightning a 'fuel critical' aircraft meaning that its missions are dictated to a high degree by its limited range. Later developments provided greater range and speed along with aerial reconnaissance and ground-attack capability.

Following retirement in the late 1980s, many of the remaining aircraft became museum exhibits and, until 2010, three Lightnings were kept flying at "Thunder City" in Cape Town, South Africa. In September 2008, the Institution of Mechanical Engineers conferred on the Lightning its "Engineering Heritage Award" at a ceremony at BAE Systems' site at Warton Aerodrome.