At the Lasham regionals gliding competition in may we had pilots aged 84 and 88 sharing a Stemme. mind you one of them was Derek Piggott
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(In case anyone hasnt heard of him he was instructing on troop carrying gliders in the war, flew stunts in 'Those magnificent men in Their flying Machines' Etc. and was CFI at Lasham for years and has written the most used books in gliding)