James Callaghan, Labour spokesperson on Colonial Affairs, spoke at a 20,000-strong rally in Trafalgar Square on 27 March 1960 to protest against the Sharpeville shootings. The rally was organised by the Labour Party. Also on the platform were African National Congress leader Tennyson Makiwane, Robert Willis from the TUC General Council and Labour MPs Barbara Castle, Anthony Greenwood and Jim Griffiths. In the days following the massacre crowds gathered spontaneously outside South Africa House.