LONDON, ENGLAND - JANUARY 28:  Catherine, Duchess of Cambridge, helps a child, during a workshop run by the National Portrait Gallery's Hospital Programme at Evelina Children's Hospital on January 28, 2020 in London, England. HRH is Patron of Evelina London Children's Hospital and Patron of the National Portrait Gallery. (Photo by Toby Melville - WPA Pool/Getty Images)
LONDON, ENGLAND - JANUARY 28: Luke Wheeler-Waddison, 10, takes a polaroid of Catherine, Duchess of Cambridge during a workshop run by the National Portrait Gallery's Hospital Programme at Evelina Children's Hospital on January 28, 2020 in London, England. HRH is Patron of Evelina London Children's Hospital and Patron of the National Portrait Gallery. (Photo by Toby Melville - WPA Pool/Getty Images)
LONDON, ENGLAND - JANUARY 28: Catherine, Duchess of Cambridge visits a workshop run by the National Portrait Gallery's Hospital Programme at Evelina Children's Hospital on January 28, 2020 in London, England. HRH is Patron of Evelina London Children's Hospital and Patron of the National Portrait Gallery. (Photo by Toby Melville - WPA Pool/Getty Images)
LONDON, ENGLAND - JANUARY 28: Catherine, Duchess of Cambridge looks at a polaroid with Luke Wheeler-Waddison, 10, and his sister Savannah, 4, during a workshop run by the National Portrait Gallery's Hospital Programme at Evelina Children's Hospital on January 28, 2020 in London, England. HRH is Patron of Evelina London Children's Hospital and Patron of the National Portrait Gallery. (Photo by Toby Melville - WPA Pool/Getty Images)