Question: What British intelligence officer worked as a double agent for the Soviet Union and was recruited by Arnold Deutsch?

full_context: Document 1: Robert Hanssen: Robert Philip Hanssen (born April 18, 1944) is a former Federal Bureau of Investigation (FBI) agent who spied for Soviet and Russian intelligence services against the United States for 22 years from 1979 to 2001. He is currently serving 15 consecutive life sentences at ADX Florence, a federal supermax prison near Florence, Colorado.
Document 2: Sidney Reilly: Sidney George Reilly MC (  1873 –  1925 ), commonly known as the "Ace of Spies", was a secret agent of the British Secret Service Bureau, the precursor to the modern British Secret Intelligence Service (MI6/SIS). He is alleged to have spied for at least four different powers.
Document 3: Cambridge Five: The Cambridge Spy Ring was a ring of spies in the United Kingdom, who passed information to the Soviet Union during World War II and was active at least into the early 1950s. Four members of the ring were originally identified: Kim Philby (cryptonym: Stanley), Donald Duart Maclean (cryptonym: Homer), Guy Burgess (cryptonym: Hicks) and Anthony Blunt (cryptonyms: Tony, Johnson). Once jointly known as the Cambridge Four and later as the Cambridge Five, the number increased as more evidence came to light.
Document 4: Ernst Deutsch: Ernst Deutsch, also known as Ernest Dorian (16 September 1890, Prague – 22 March 1969, Berlin), was an Austrian actor. In 1916, his performance as the protagonist in the world première of Walter Hasenclever's Expressionist play "The Son" in Dresden was praised. Deutsch also played the antihero Famulus in Paul Wegener's "" in 1920. He is known by English-speaking audiences for his role as Baron Kurtz in Carol Reed's 1949 "film noir", "The Third Man".
Document 5: Klaus Fuchs: Emil Julius Klaus Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist and atomic spy who, in 1950, was convicted of supplying information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly after the Second World War. While at the Los Alamos National Laboratory, Fuchs was responsible for many significant theoretical calculations relating to the first nuclear weapons, and later, early models of the hydrogen bomb.
Document 6: Kim Philby: Harold Adrian Russell "Kim" Philby (1 January 1912 – 11 May 1988) was a high-ranking member of British intelligence who worked as a double agent before defecting to the Soviet Union in 1963. He served as both an NKVD and KGB operative.
Document 7: Rudolf Abel: Rudolf Ivanovich Abel (Russian: Рудольф Иванович Абель ), real name Vilyam "Willie" Genrikhovich Fisher (Вильям "Вилли" Генрихович Фишер), (July 11, 1903 – November 15, 1971) was a Soviet intelligence officer. He adopted his alias when arrested on charges of conspiracy by FBI agents in 1957.
Document 8: Ernst Deutsch: Ernst Deutsch, also known as Ernest Dorian (16 September 1890, Prague – 22 March 1969, Berlin), was an Austrian actor. In 1916, his performance as the protagonist in the world première of Walter Hasenclever's Expressionist play "The Son" in Dresden was praised. Deutsch also played the antihero Famulus in Paul Wegener's "" in 1920. He is known by English-speaking audiences for his role as Baron Kurtz in Carol Reed's 1949 "film noir", "The Third Man".
Document 9: Operation Silver (1949): Operation Silver was a British intelligence operation in Allied-occupied Austria which ran from 1949 to 1955 that covertly tapped into the landline communications of the Soviet Army headquarters in Vienna. Although the operation was considered a success, the details of it were passed on to the KGB in October 1953 by George Blake, a British double agent.
Document 10: Arnold Deutsch: Arnold Deutsch (1903–1942?), variously described as Austrian, Czech or Hungarian, was an academic who worked as a Soviet spy, best known for having recruited Kim Philby. Much of his life remains unknown or disputed.
Document 11: Edith Tudor-Hart: Edith Tudor-Hart (née Edith Suschitzky; 1908–1973) was an Austrian-British photographer, communist-sympathiser and spy for the Soviet Union. Some of her work is in the National Gallery in London. Brought up in a family of socialists, she trained in photography at Walter Gropius's Bauhaus in Dessau, and carried her political ideals through her art. Through her connections with Arnold Deutsch, Tudor-Hart was instrumental in the recruiting of the Cambridge Spy ring which damaged British intelligence from World War II until their discovery in the late 1960s. She recommended Litzi Friedmann and Kim Philby for recruitment by the KGB and acted as an intermediary for Anthony Blunt and Bob Stewart when the "rezidentura" at the Soviet Embassy in London suspended its operations in February 1940.<ref name="Guardian 21/8/2015">The Guardian", 21 August 2015, "How MI5 failed to expose matriarch of Cambridge spy ring" by Ian Cobain</ref>
Document 12: Attorney General v Blake: George Blake was a former member of the Secret Intelligence Service (MI6) from 1944 to 1961. For his employment contract, he had signed an Official Secrets Act 1911 declaration to disclose no information about his work. It applied after his employment ceased. In 1951, he became a Soviet agent, thus, being a double agent. He was discovered in 1961 and the British government imprisoned him in Wormwood Scrubs (HM Prison). He escaped in 1966 and fled to the Soviet Union. He wrote a book about it and his secret services work called "No Other Choice". He received a publishing contract for its release in 1989, with Jonathan Cape Ltd. The information in the book was no longer confidential. Blake received advanced payments and was entitled to more. The Crown brought an action for all the profits he made on the book including those that he had not yet received. It argued a restitutionary principle should apply.
Document 13: John Cairncross: John Cairncross (25 July 1913 – 8 October 1995) was a British civil servant who became an intelligence officer and spy during the Second World War. As a Soviet double agent, he passed to the Soviet Union the raw Tunny decrypts that influenced the Battle of Kursk. He was alleged to be the fifth member of the Cambridge Five.
Document 14: Eric Roberts (spy): Eric Arthur Roberts (18 June 1907 - 17 or 18 December 1972) was an MI5 agent during the Second World War under the alias Jack King. By posing as a Gestapo agent, and infiltrating fascist groups in the UK, Roberts was able to prevent secret information finding its way to Germany. Roberts continued to work for the security services after the war, notably in Vienna, but it was a time of great anxiety in the services due to the suspicions surrounding double agents such as the Cambridge Five. Roberts never felt completely accepted by MI5 due to his different social background, and moving to a less active desk role did not suit him so well as his wartime role.
Document 15: John le Carré: David John Moore Cornwell (born 19 October 1931), known by the pseudonym John le Carré ( ), is a British author of espionage novels. During the 1950s and the 1960s, he worked for both the Security Service and the Secret Intelligence Service, and began writing novels under his pen name. His third novel, "The Spy Who Came in from the Cold" (1963), became an international best-seller and remains one of his best-known works. Following the success of this novel, he left MI6 to become a full-time author.
ground_truth: Kim Philby