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LONDON, ENGLAND - OCTOBER 24: Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Christopher Furlong - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 24:  Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982.  (Photo by Christopher Furlong - WPA Pool/Getty Images)

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LONDON, ENGLAND - OCTOBER 24: Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Christopher Furlong - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 24:  Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982.  (Photo by Christopher Furlong - WPA Pool/Getty Images)

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LONDON, ENGLAND - OCTOBER 24: Queen Maxima of the Netherlands kisses Queen Elizabeth II on the cheek during a formal farewell at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Christopher Furlong - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 24: Queen Maxima of the Netherlands kisses Queen Elizabeth II on the cheek during a formal farewell at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982.  (Photo by Christopher Furlong - WPA Pool/Getty Images)

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LONDON, ENGLAND - OCTOBER 24: Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Christopher Furlong - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 24:  Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982.  (Photo by Christopher Furlong - WPA Pool/Getty Images)

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LONDON, ENGLAND - OCTOBER 24: Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Christopher Furlong - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 24:  Queen Elizabeth II attends a formal farewell for King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace as their two day State Visit draws to a close on October 24, 2018 in London, United Kingdom. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982.  (Photo by Christopher Furlong - WPA Pool/Getty Images)