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LONDON, ENGLAND - JULY 12: Britain's Queen Elizabeth II and Prince Philip, Duke of Edinburgh stand next to a display of Spanish items from the Royal Collection at Buckingham Palace on July 12, 2017 in London, England. This is the first state visit by the current King Felipe and Queen Letizia, the last being in 1986 with King Juan Carlos and Queen Sofia. (Photo by Neil Hall - WPA Pool/Getty Images)

LONDON, ENGLAND - JULY 12: Britain's Queen Elizabeth II and Prince Philip, Duke of Edinburgh stand next to a display of Spanish items from the Royal Collection at Buckingham Palace on July 12, 2017 in London, England.  This is the first state visit by the current King Felipe and Queen Letizia, the last being in 1986 with King Juan Carlos and Queen Sofia.   (Photo by Neil Hall - WPA Pool/Getty Images)