The Avro 730 was a radical 1954 design that was initially to provide recon for the V-Bomber force and then changed to multi-role as a Recon Bomber with the capability of traveling at Mach 3 to target armed with a Blue Rosette free-fall nuke. It would feature an advanced aerodynamic design of stretched canard-delta with engine wing pods, hidden cockpit, and loaded with electronics. By the latter '50s a prototype of the recon bird was under construction when in 1957 the Defense White Paper cancelled all such manned projects. The logic that was within the 10 year development time Soviet missile technology would be able to reach it and shoot it down despite a ceiling of 66,000 ft traveling at Mach 3 sustained. Further complications arose with the development of the engines and also the Mach 3 test aircraft Bristol 188 never reached Mach 3 itself. The sole prototype was to fly in 1959 but was scrapped... another tragic British loss.

http://prototypes.free.fr/tsr2/images/avro730_03.jpg