From traitor’s confession to Queen’s involvement - Trove of newly declassified files detail investigations into some of country’s most notorious double agents the ‘Ring of Five’ who passed information ...

Newly declassified files show the moment the notorious Cambridge double agent finally confessed to his treachery.

The Cambridge spy Kim Philby declared he would have done it all again after he finally confessed that he had been for years a Russian agent, according to newly-declassified intelligence files.

Kim Philby was the quintessential spy, a man who charmed and betrayed in equal measure. To his colleagues in MI6, he was the consummate professional, rising swiftly through the ranks of Britain ...