I have a vague recollection from somewhere that the only BA Concorde ever to stand chance of flying again was the one that returned home to Filton. Seem to remember that there was a discussion around the time the announcement over the 2012 Olympics was made about restoring it to do a flypast at the opening ceremony.
However, that was a few years back and I've been to the pub far too many times since then to recall the source, or to say for sure.