I thought the program was excellent, only problem was the narrator who's delivery could have been an awful lot better. Dan Snow would have done a better job I think.
I too, in the sixties, had the very great pleasure of meeting Barnes Wallis, he was at that time still working for BAC, as it then was. I went to the Museum at Weybridge a while ago and when I walked into his office it was just as I remebered it. Only things missing were the Tallboy & Grandslam bombs either side of the entrance to the "tower"