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16th May 1965: Ex-British prime minister Harold MacMillan (1894 - 1986) and Jackie Kennedy (1929 - 1994), widow of assassinated US president John F Kennedy at Birch Grove, Sussex. Mrs Kennedy is visiting the country to attend the inauguration of a memorial to her husband in Runnymede, Surrey. (Photo by David Cairns/Express/Getty Images)

16th May 1965:  Ex-British prime minister Harold MacMillan (1894 - 1986) and Jackie Kennedy (1929 - 1994), widow of assassinated US president John F Kennedy at Birch Grove, Sussex. Mrs Kennedy is visiting the country to attend the inauguration of a memorial to her husband in Runnymede, Surrey.  (Photo by David Cairns/Express/Getty Images)