"The British Aircraft Corporation Tactical Strike/Reconnaissance 2 (TSR-2) was an ill-fated Cold War strike aircraft developed by the British Aircraft Corporation (BAC) for the Royal Air Force (RAF) in the early 1960s. The TSR-2 was designed to penetrate a well-defended forward battle area at low altitudes and very high speeds, and then attack high-value targets in the rear with close-in bomb runs and precision drops. The TSR-2 included a number of advanced features that made it the highest performing aircraft in this role, yet the programme was controversially cancelled in favour of the General Dynamics F-111, a procurement that itself was later cancelled."

"All modern aircraft have four dimensions: span, length, height and politics. TSR-2 simply got the first three right." - Sir Sydney Camm

http://en.wikipedia.org/wiki/BAC_TSR-2