For anyone who is an espionage buff, this article references a still unfinished chapter from one of the great stories of the Cold War. The story contains so many layers it's hard to take it all in.
If you're unfamiliar with the Cambridge Five, I heartily recommend 'A Spy Among Friends' by by Ben Macintyre and John le Carré.
This recent work is (I think) one of the better treatments of the subject. I also appreciated how the author(s) tied in Philby's relationship with James Angleton... a dark, fascinating if maddening character who hovers over the darkest days of US intelligence during its scandalous 'golden age'.
It's interesting to consider that after all these years, the British government does not want to release the final names or all the pertinent information. These events transpired some fifty-odd years ago.
The Cold War has ended but the resulting apparatus in the UK and USA live on. There are still many secrets and elements of the Establishment system that (from their perspective) must be kept out of the public eye.