Peter, how remiss of me. I was thinking of Bomber Groups, but of-course the 56th FG were based at Halesworth.
I had good contact with Buzz Took and Richie Pymar there who helped me when I created a short animated film about Robert S. Johnson's battle on June 26th:
http://blip.tv/file/4456021
I think I could certainly make that a port of call. Thanks for the reminder, cheers.