Thanks for the advice, AA; my copy is a 1978 paperback which I picked up years ago at Bamburgh Castle bookshop for a mere 60p (original price £2.25) but a swift check on Amazon tells me there's an amended version available - yes, it's about £10 with postage and on its way.
Whatever the mean detail, the fact remains that here is an aviator of much renown and a real National Treasure. I envy those who have met this gallant gentleman.