I might have made that up. An internet search is not backing up my outrageous claims with any evidence. Can anyone shed any light? I'm sure it happened in the late 80's. A light aircraft was involved. Then again it could have all been a dream....
I do recall something about a Tornado Navigator who returned to flying after a heart and lung transplant. He was later killed in a mid-air with a light aircraft while on a low level cross country exercise. Google turns up too much crap when you enter 'heart transplant' and 'tornado' or 'raf navigator' as search terms - even in advanced search.