Poster for a meeting calling for a boycott of official celebrations of the 600th anniversary of the Anglo-Portuguese Alliance in July 1973. The main speakers were Oliver Tambo and FRELIMO Vice-President Marcellino dos Santos. Labour MP Judith Hart called for Portugal to be expelled from NATO and for an end to British support for the ‘unholy alliance’ of Portugal, South Africa and Rhodesia. The meeting was attended by over 1,500 people.