The documents reveal fascinating new details about the infamous MI6 double agent Kim Philby and his betrayals ... west London (James Manning/PA Wire) But perhaps the most shocking revelation ...

The members of the ring were Donald Maclean (1913 - 1983), Guy Burgess (1911 - 1963), Harold 'Kim' Philby (1912 - 1988) and Anthony Blunt (1907 - 1983). Several other people have been suggested as ...