The subject has, of course, been thrashed to death on here over the years
There is a very good, comprehensive publication "TSR2 with Hindsight" published in 1998 by the RAF Historical Society ed AVM A. F. C Hunter ISBN 0-9519824 8 6 which covers a symposium in 1997 at Filton with apers from a load of the really important players - Beetham, Beaumont, Mears, Wragg, Page, Dell, Hine & Edwards etc etc