Discussions began in March 1964 between Kenya and Secretary of State for Commonwealth Relations Duncan Sandys on defence, and a formal agreement was signed on 3 June 1964. All British troops would leave by 12 December 1964, the British would assist the army, resource and train a new Kenya Air Force, and create a new Kenya Navy. They would also provide RAF and Army units to support internal security in the north-east. Significant military loans would be cancelled, and much military property made over to the Kenyan Government. In return, British aircraft would be able to transit through Kenya, RN ships of the Far East Fleet and other units could visit Mombasa, communications facilities could be used until 1966, and troops could exercise in Kenya twice a year. Army training deployments have continued up until 2015, as of 2015 supervised by British Army Training Unit Kenya.