I had the good fortune to meet Mike (Coffman Starter) at the Tangmere Aviation Museum. He had not served in the RAF but if I recall correctly he had served with the RAFVR(T). He had a deep interest in all things aviation which is why he flagged up the 'Global Aviation' article which resulted in this thread becoming what it is. His best loved a/c was the Chipmunk. We will miss his gentle humour, his patience and his expertise.