LONDON, ENGLAND - NOVEMBER 18: HM Queen Elizabeth II and HRH Prince Philip, Duke of Edinburgh are joined by members of the Royal Family for a dinner in Clarence House hosted by HRH The Prince of Wales and HRH The Duchess of Cornwall, on Sunday November 18, 2007 in London, England. . The dinner party is in celebration of the forthcoming Diamond Wedding Anniversary of the Queen and The Duke. (Photo by Tim Graham/Getty Images)

LONDON, ENGLAND - NOVEMBER 18: HM Queen Elizabeth II and HRH Prince Philip, Duke of Edinburgh are joined by members of the Royal Family for a dinner in Clarence House hosted by HRH The Prince of Wales and HRH The Duchess of Cornwall, on Sunday November 18, 2007 in London, England. . The dinner party is in celebration of the forthcoming Diamond Wedding Anniversary of the Queen and The Duke.  (Photo by Tim Graham/Getty Images)