More than 100 secret MI5 files have been declassified for the first time, shedding light on the lives of five of Britain’s most infamous KGB spies. New information is revealed about the confessions of Kim Philby and Anthony Blunt, two British MI5 agents who spied for the Soviet Union.
Along with Guy Burgess, Donald Maclean and John Cairncross, the group came to be known as the “Cambridge Five”, with all of them being former Cambridge University students who passed information to the KGB from the 1930s until at least the 1950s.