Didn't Philby end up drinking himself to death in Moscow (or somewhere over there). Guess the guilt and associated joys of living in the worker's paradise were too much for him.
Philby did end up a drinker in Moscow but lived to 76.He never professed any guilt or remorse.He had Sinatra's version of "My Way" played at his funeral.You may be thinking of Donald MacLean who was already drinking himself to death while he was still at Cambridge. He was cosidered one of the sharpest minds at the Foreign Office in his younger days! I think the slightly homophobic comment from someone else may refer to him as well as he was as openly homosexual as was possible in those days.
I'm not sure what was coming to them. The last executions in Britain were in 1964. I'm no lawyer but I think that since they started spying for the Soviet Union when it was an ally they could not have been hanged for treason. I'm sure a long prison sentence would have been handed down.George Blake got 45 years,although he escaped and made his way to Moscow.There were quite a few of them there Philby,Burgess,MacLean and Blake! Others like Cairncross and Blunt eventually confessed but were never prosecuted.
The long list of names,many senior, gives an idea of the damage these idealogically driven traitors did to the British intelligence effort during the early part of the "cold war"
Steve