The follow up fighter aircraft was as fast on one engine, and it had two! I'm talking about the TSR-2! Unfortunately the Americans killed it, and tried to sell us us the F111.
About 25 years ago, I bought some tooling off an old gent in our village.
Ted had been a toolmaker at BAC and made various jigs and fixtures for the TSR project, all to very exacting toolroom standards.
When TSR project was cancelled, he was told to smash the jigs and fixtures to pieces. BAC Security actually stood over him as he did so.
Arwyn