The only picture ever taken of Concorde flying at Mach 2 (1,350 mph). Taken from an RAF Tornado fighter jet, which only rendezvoused with Concorde for 4 minutes over the Irish Sea: The Tornado was rapidly running out of fuel, struggling to keep up with Concorde at Mach 2.
Blackburn Buccaneer S2. Using the more powerful Spey engines. The aircraft was designed to run at high subsonic speed at low level, but the lack of supersonic performance meant it was reluctantly accepted by the RAF after the cancellation of the TSR2. Always seen as a stopgap, the aircraft suffered from a lack of development of its radar and electronics.