Cinders,
If only we could go back in time, and drop off an IBM laptop to them it would have saved so much time.
But being serious, when you compare the size of the computer machinery they had which took up three rooms in its physical size, its amazing how quick the computer technology has moved forward since the war. It seemed to go dead until about the early 80's then BOOOM computers and mobile telephony were household.
These clever people cracked it in a few war years.......amazing what they achieved, when you are put under a lot of pressure to save your way of life in England![]()