LONDON, UNITED KINGDOM - NOVEMBER 20: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince Charles, Prince of Wales attends a service of thanksgiving for Lady Mary Soames at Westminster Abbey on November 20, 2014 in London, England. Lady Mary Soames, the last surviving child of Britain's World War II Prime Minister Winston Churchill, died at the age of 91 on May 31, 2014. (Photo by Max Mumby/Indigo/Getty Images)