“The release reveals new details in the cases of the Cambridge spies Kim Philby, Anthony Blunt and John Cairncross ... loyalty” to Britain’s MI6 spy agency, where he served as a high ...

Several other people have been suggested as belonging to the ring, including John Cairncross ... but on the outbreak of war joined MI6. Maclean was in the Foreign Office during the same period.

Philby and Blunt were, along with Guy Burgess, Donald Maclean and John Cairncross, part of the "Ring ... figure in Britain's foreign spy agency MI6, in which he finally admits his deception ...

The Cambridge Five consisted of Harold ‘Kim’ Philby, Guy Burgess, Donald Maclean, Anthony Blunt and John Cairncross ... and he was confronted by an MI6 Officer in 1963 who is rumoured to ...