A file containing documents concerning Anglo-Soviet relations. The file includes plans for an official visit to the Soviet Union by the British prime minister; a list of policy briefs to be prepared for the prime minister's visit; a letter from Downing Street recounting a visit by the Soviet ambassador to the U.K. to discuss proposed dates for the visit; a list of speaking notes drafted by the Foreign Secretary for the prime minister's visit; and a discussion the possibility of liberalising trade with the Soviet Union. The file also includes notes on British and Soviet trade interests; a note on the case of Gerald Brooke, a British citizen arrested in the Soviet Union by K.G.B. agents for smuggling anti-Soviet leaflets; background notes on Soviet defectors to the U.K.; and the text of a message from the American president, Lyndon B. Johnson, to the Soviet prime minister concerning a nuclear non-proliferation treaty.