1957-1963: Harold Macmillan (Conservative w/ Liberal National & Unionist) 1959: Hugh Gaitskell (Labour), Jo Grimond (Liberal) 1963-????: Duncan Sandys (Conservative) [1] 1964: Harold Wilson (Labour), Jo Grimond (Liberal) [2] 1967: Harold Wilson (Labour), Jo Grimond (Liberal) [3]
1971: Michael Stewart (Labour), James Davidson (Liberal) [4] 1973-1976: Geoffrey Rippon (Conservative)[5] 1976-????: Anthony W. Benn (Labour) [6] 1976: Geoffrey Rippon (Conservative), James Davidson (Liberal), William Wolfe (Scottish National) [7]