Q5 - from memory the accident at Redhill was early 1986 which would tie in with the aircraft being registered to Desmond Penrose later that year. It was also damaged by an Auster running amok at Redhill a year or so previously.
Aeroplane Monthly published a two part account of the restoration by Tom Storey and Martin Barraclough several years ago - included a potted history I'll see if I can locate tonight.
PS, think it was Ernie Crabtree...