G-BBDG?
I'm no Concorde expert, but the following quote from the link below may also help:-
The aircraft was kept serviceable at Filton throughout early 1982 for any further development work or test flights that might be required.
CONCORDE SST : DEVELOPMENT FLEET : 202
Last edited by spekesoftly; 17th Feb 2018 at 11:37.
Reason: To correct link