Mr. Wright asserts that Roger Hollis, an M.I.5 chief, was a double agent working for the Soviets - a claim the Government says has never been substantiated.

By carefully selecting pieces of so-called evidence, in reality negative evidence, these Golitsin disciples were able to construct cases against all manner of people including, of course, Sir Roger Hollis.

One of his main claims was that MI5 had been fully penetrated by Russian intelligence which led to the allegations that Roger Hollis was himself a Russian mole.

Roger Hollis, a former head of MI5, who studied at Worcester College, Oxford, in the 1920s, is already a well-known suspect.

Maxwell Knight's famous paper about KGB infiltration, 'The Comintern is Not Dead', which Roger Hollis apparently shelved, is ignored.

As claimed in Spycatcher, Wright had come to believe that Roger Hollis was the highest traitor in MI5.

Is Philby to be believed when he dismisses the suspicion that Roger Hollis, a former director general of M.I.5, was actually another Soviet mole?

Roger Hollis - Director General of MI5.

Roger Hollis, the head of MI5 at that time, refused to authorize publication, as did Prime Minister Alec Douglas-Home.

The executive officer during this time, Roger Hollis, said that he felt Wilson's government would use this information against MI5 if the incoming government found out.