On 7 January 1961 Metropolitan Police Special Branch team of Detective Superintendent George Gordon Smith arrested five people, all members of the Portland Spy Ring. Gordon Lonsdale was arrested on the Waterloo Bridge the same moment he had received classified material from Harry Houghton. At the Scotland Yard he told Smith he would not disclose his real name or address or any other information. MI5, the Central Intelligence Agency (CIA), and the Royal Canadian Mounted Police (RCMP) investigators` team had to resort to extensive enquiries. They were able to pinpoint his Russian origin, naval background and use of false Canadian papers.