The Air Intelligence Branch, or at least their collection, was stationed at Kenly at the end of the war. At some point all the data plates they had taken from axis aircraft were dumped. Lanscaping in the eighties left (quite literally) thousands of Luftwaffe, Japanese and even Italian data plates strewn about. Some even had their provenance written on the back in pencil. A gentleman from Croyden had animal feed sacks full of them. That might give Time Team something to look at!