So, after much digging I have got hold of the newspapers (specifically the Belfast Telegraph and the Newsletter) from the day of the show.
No photos of Concorde, only a photo of a chap landing his Piper Cub on a truck – I remember that – and a long article telling us that the airshow meant lots of delays for holiday makers, as well as the Spanish Air Traffic Controller strike that was due on the same day. A short list of visiting aircraft mentions the Red Arrows and various other RAF types.
Once I get a chance I will scan the front page of the Belfast Telegraph and post it here.