Pincher was convinced that, alongside Wilson, many other members of the Labour Party were Soviet agents, among them Member of Parliament, Tom Driberg, who was Chairman of the Labour Party. Pincher claimed that Driberg was an active double agent for MI5 and the KGB despite his well-founded reputation for total indiscretion. "Treachery: Betrayals, Blunders, and Cover-ups: Six Decades of Espionage Against America and Great Britain", first published in 2009, brings the known Soviet espionage cases against the UK and United States up to date.