Oh Dear. I was on 543 Sqn from 69 to 73 and was involved with two Lima detachments (71 and 72) and Midway. I am now 62 and so far, touch wood, seem to be ok. However, I would be keen to find out what is going on as I have often wondered about the lack of safety precautions with regard to the radiation hazard. I won't say to much at this stage as some of what went on may still be classified! I think the official line was "upper atmosphere reseach for the World Heath Organisation" If I remember correctly the the whole thing was supervised by staff from the AWRE at Aldermarston. Grp Capt R-W headed up the team.