Some people may find this site interesting, although somewhat biased in point of view re the actions of certain key players it does go into useful detail about the requirements for the aircraft:
http://www.spyflight.co.uk/main.htm and select TSR2.
DZ I should have brought this up earlier- Bucaneer didn't do the recce thing, and if you want to go for internal weapons only, TSR2 packed about twice as much as the Bucc. Start hanging stuff outside the frame and the speed/range equations go to the BAC product.
Personally speaking I am neither for nor against an unproven aircraft, it may have been great, then again it may not. If it was in service during the GW1 period would we have been putting up our hands in shame in deploying a complete attack force of 30 year old aircraft? What came after did a good job for many years after its sell by date, but I suspect it didn't do as good a job as the requirement that dictated TSR2 actually wanted.