Philby and Blunt were, along with Guy Burgess, Donald Maclean and John Cairncross, part of the "Ring of Five" - former Cambridge University students who passed information to the Soviets from the ...

Several other people have been suggested as belonging to the ring, including John Cairncross. Blunt became a communist in the early 1930s and was recruited by the NKVD (later KGB), the Soviet ...