Dams Raid
Champers,
I guess if you are in the far north west it may be a bit superfluous but there is some good stuff at the Brooklands Museum, esp Barnes Wallis (if not on the internet then an old fashioned letter may yeild results, they are v helpful).
Also try a google earth sat pic of the dams now, when I flew over them you could still see the patches.
rgds
SMK