Is there
another possibility?
S-76A+ G-BHBF, Aberdeen, 23rd March 23rd 1991
I'm afraid my premise for suggesting this as a contender for 'Iron Lady 1' is pretty flimsy and rests solely on the style of the Bristow title on the for'ard cowling and which matches that of Dave Ed's photo but .. it lacks the titles above the door as well as the white 'door surround' safety stripe (they may have been removed later for various reasons).
'BF' was of course also known as 'The Spirit of Paris'.
I am certain that someone knows which craft was deployed and, as I.I. has suggested, it may well have been G-BIEJ.