Burgess, Blunt, Philby, Maclean and Cairncross

Frank, do you know anyone whose grandfather knew any of The Cambridge Five? Anything that you can get, no matter how trivial, will do. Where did any of them they buy their tea? What was their favourite beer? Which pubs did they use?

Did they all watch Cambridge United? I can imagine all 5 of them standing on the terraces together, talking in code :-
"The right half is s­hite but the inside left is excellent".
"Yes, and the goalkeeper will get injured next Tuesday".

If they had managed to get such audio presumably the code-breakers at Bletchley Park could have informed the appropriate people and thwarted such espionage.