The Jewish Chronicle has a very interesting article on this topic by Robert Hannigan, the Director of GCHQ. As he says:
“I rarely write in public. But the death of Rolf Noskwith earlier this month, at the age of 97, prompts me to tell the story of our remarkable group of Jewish staff at Bletchley Park during the Second World War and the years that followed.”
Apart from the historical narrative, note the confirmation of the close connection between the British and Israel signals intelligence communities. Read it all here.