Concorde was never granted permission to fly supersonic (mach1 and above) over populated areas. Even Braniff when using Concorde to Dallas had to fly at Mach 0.98 (I stand to be corrected). Maybe it was allowed over certain limited population areas, and definitely over sea, QE2 passengers had the pleasure of the "boom", but certainly not over central London.
When Concorde flew to Bahrain and Singapore it was restricted to "fast" subsonic over mainland Europe.