I guess you mean 23/05.
Also It would have been 10/28 L&R when Concorde went into service.
Dixi, You are absolutely correct, so I have corrected my posting, and glad to see that someone actually reads my postings
My only excuse is age, phew what would I do without that excuse
Great answers about the runways Brit312 but you missed one. In 2003 we started doing take offs from 9 Left (just Concorde). This was due to construction work on the southern runway. The aeroplane would come really low over the hangars too and made quite a spectacle.
Regards
My only excuse for not knowing that was it was after my time with the old girl, but now you mention it I seem to remember that previous to 2003 we might have been able to use 09L again due to work on 09R , but if I remember correctly we had to ask for special permission.
Mind you as I said above the memory is fading with age