Question: What is the full name of one of the double agents who met Russian handlers at St Ermin's Hotel in London?

full_context: Document 1: 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 2: Mandarin Oriental Hyde Park, London: Mandarin Oriental Hyde Park, London is a five-star hotel, located in the Knightsbridge district of London, owned and managed by Mandarin Oriental Hotel Group. Housed in an historic, Edwardian-style building, the hotel originally opened its doors to the public as the Hyde Park Hotel in 1902. Mandarin Oriental Hotel Group purchased the hotel in 1996 and conducted a complete renovation of the 198 rooms and suites, as well as a re-design of the restaurants and bar. Mandarin Oriental Hyde Park, London re-opened in May 2000.
Document 3: Colonnade Hotel: The Colonnade Hotel (previously known as "The Esplanade hotel") is a 4-star London hotel with 43 rooms, of which 3 are suites. The hotel is located opposite Warwick Avenue tube station and Little Venice.
Document 4: 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 5: St Ermin's Hotel: St. Ermin's Hotel is a four-star central London hotel adjacent to St James's Park underground station, close to Westminster Abbey, Buckingham Palace and the Houses of Parliament. The Grade II-listed late Victorian building, built as one of the early mansion blocks in the city is thought to be named after an ancient monastery reputed to have occupied the site pre-10th century. Converted to a hotel in 1896–99, it became during the 1930s, through the Second World War and beyond, a meeting place of the British intelligence services, notably the birthplace of the Special Operations Executive (SOE), and where notorious Cambridge Five double agents Philby and MacLean met their Russian handlers.
Document 6: Cold War (1947–1953): The Cold War (1947–1953) is the period within the Cold War from the Truman Doctrine in 1947 to the conclusion of the Korean War in 1953. The Cold War began almost immediately following World War II and lasted through most of the 20th century. Political relations between the USA, Britain, Canada and the USSR were tainted within days of VJ-Day when cipher clerk Igor Gouzenko defected from the Soviet embassy in the Canadian capital, offering documentary proof of two wartime networks of Soviet spies in North America, one aimed at the Manhattan Project. In the next five years spies Julius and Ethel Rosenberg and Klaus Fuchs were exposed and British diplomats Guy Burgess and Donald Maclean defected to the Soviet Union.
Document 7: 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 8: Palace of Westminster: The Palace of Westminster is the meeting place of the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Commonly known as the Houses of Parliament after its occupants, the Palace lies on the north bank of the River Thames in the City of Westminster, in central London.
Document 9: 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 10: 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 11: Pall Mall Restaurant: The Pall Mall Restaurant was a hostelry situated at Number 1 Cockspur Street, Westminster, London, just off Pall Mall and near Trafalgar Square. The site was subsequently the offices of the White Star Line, and was then occupied by a Tex Mex restaurant, the Texas Embassy Cantina. Currently the site is unused.
Document 12: Malmaison Hotel, Reading: The Malmaison Hotel Reading (formerly the Great Western Hotel) is a grade II listed hotel in the town of Reading in the English county of Berkshire. It is situated at the junction of Blagrave Street and Station Road, directly opposite the main entrance to Reading railway station. It was opened in 1844, shortly after the Great Western Railway opened its line from London, and is thought to be the oldest surviving purpose-built railway hotel in the world.
Document 13: St. Pancras Renaissance London Hotel: The St. Pancras Renaissance London Hotel is a hotel in London, England, forming the frontispiece of St Pancras railway station. It opened in 2011, and occupies much of the former Midland Grand Hotel designed by George Gilbert Scott which opened in 1873 and closed in 1935. The building as a whole including the apartments is known as St Pancras Chambers and between 1935 and the 1980s was used as railway offices. Its clock tower stands at 82m tall, with more than half its height usable.
Document 14: Kimpton Sir Francis Drake Hotel: The Kimpton Sir Francis Drake Hotel is a 416-room boutique hotel located in San Francisco, California at the corner of Sutter and Powell Streets adjacent to the city’s central urban entertainment and shopping district, Union Square. The property was named after the English explorer who, in 1579, narrowly missed discovering San Francisco Bay and instead sailed the Golden Hind into Drake’s Bay 28 miles north. Built in 1928 by Midwestern hotel developers Leon W. Huckins and John A. Newcomb for the then princely sum of $5 million, the hotel was run by several major hotel companies before being purchased by an investment partnership led by Bill Kimpton, founder of Kimpton Hotels & Restaurants, in 1994. Kimpton sold the property in 2005, but still manages the historic hotel. In addition to its Union Square location, the Drake is known for its opulent, Renaissance-style interiors, Italian restaurant, Scala’s Bistro, and as the location of a 21st story nightclub that has been a city attraction for decades, The Starlight Room.
Document 15: 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.
ground_truth: Kim Philby