It was held Hold in the United Kingdom in March 1961 , and was hosted Participation by that country 's Prime Minister , Harold Macmillan .

The `` Keep South Africa In '' group included Britain 's Harold Macmillan , Rhodesia and Nyasaland 's Roy Welensky , Australia 's Robert Menzies and Keith Holyoake of New Zealand .

It was held in the United Kingdom in May 1960 , and was hosted Placing by that country 's Prime Minister , Harold Macmillan .

However , Macmillan insisted Statement that the final communique could only include Cause_to_be_included matters on which the leaders were unanimous .