The problem with TSR-2 is not that it was funded, it's that the requirement changed so much from when EE were first given the nod. If it hadn't been used as the cudgel with which to amalgamate the industry and if the design had been frozen without being meddled into a mid-range strategic nuclear platform, EE could have given them an in-house winner to go with its other two in-house winners (Canberra and Lightning). Vickers could and should have been second fiddle, not co-manager.being far more hard nosed on what to fund and what not would have been far better.
e.g. no TSR2, no Concorde, no V-1000 etc.
Too many cooks spoiled that broth (and some of them were not good cooks).