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LONDON, ENGLAND - OCTOBER 23: British Prime Minister Theresa May, Secretary of State for Foreign Affairs Jeremy Hunt, King Willem-Alexander of the Netherlands, Queen Elizabeth II, Queen Maxima of the Netherlands, Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall are seen during a ceremonial welcome at Horse Guards Parade on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Christopher Furlong/Getty Images)

LONDON, ENGLAND - OCTOBER 23: British Prime Minister Theresa May, Secretary of State for Foreign Affairs Jeremy Hunt, King Willem-Alexander of the Netherlands, Queen Elizabeth II, Queen Maxima of the Netherlands, Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall are seen during a ceremonial welcome at Horse Guards Parade on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982.  (Photo by Christopher Furlong/Getty Images)