staircase - apologies to your mate's mum!
I started work there in 1967 so we must have spoken over the telephone. I remember Hedley Hazelden; he was Handley Page's chief test pilot before Autair and was flying the prototype Herald (with four Alvis Leonides engines) that suffered an engine fire en-route Farnborough and he had to put it down in a field. I believe his wife was on board.