sentences:  On 26 April 1984 Leahy succeeded in securing the release of the British hostages at the UNITA base in Jamba, Cuando Cubango, Angola.In June 1984, Thatcher received a visit from P. W. Botha, the first South African premier to come to Britain since his nation had left the Commonwealth in 1961.Neil Kinnock, the Leader of the Opposition condemned the visit as a "diplomatic coup" for the South African government, and Labour MEP Barbara Castle rallied European Socialists in an unsuccessful attempt to stop it.