I called Tommy Thompson today on the occasion of his 90th (!) birthday
and remembered to ask him about the tickets. They were in fact for the German aircraft exhibition at Farnborough that year, though he did deliver them to a chap at Heston, flying from Exeter via Yeovil.
He also mentioned that he chatted to 'Winkle' Brown earlier this year at the Rolls-Royce aircrew luncheon held annually at Popham, plus a number of his ex-de Havilland Hatfield colleagues, and a charming young lady who flies airliners and a de Havilland Moth.
Good Health Tommy!
brgds
Alan