Its written in history now and he can rest knowing that he did a helluva a job in getting it to Mach2, although he reckoned Mach5 was just a few weeks away when they pulled the plug.
I'm a great fan of the TSR-2, but never in a 100 years did Roland Beaumont say that..
Mach 5 
It was an aluminium aircraft and would lose all strength and almost melt!
XR 219 did 13 or 14 test flights in all, and
AFAIK went supersonic once on a ferry flight to Warton, achieving circa M 1.3 as only one engine would come on to full reheat.
Additionally, the Olympus engines were in their very early stages of development, with all components still being debugge, especially the fuel control system and so were de-rated. As we know, they went on to become the largest gas turbine core engine anywhere in the world for a considerable time, with superb reliability, thrust to weight and excellent super-cruise fuel efficiency (due to that large core)...