LONDON, ENGLAND - MARCH 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are greeted by Dean of Westminster The Very Reverend Dr David Hoyle (R) and Paul Baumann, Receiver General and Chapter Clerk (L) during a visit to the Covid-19 vaccination centre at Westminster Abbey on March 23, 2021 in London, England. (Photo by Aaron Chown - WPA Pool/Getty Images)
LONDON, ENGLAND - MARCH 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge during a visit to the Covid-19 vaccination centre at Westminster Abbey on March 23, 2021 in London, England. (Photo by Aaron Chown - WPA Pool/Getty Images)
LONDON, ENGLAND - MARCH 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge during a visit to the Covid-19 vaccination centre at Westminster Abbey on March 23, 2021 in London, England. (Photo by Aaron Chown - WPA Pool/Getty Images)
LONDON, ENGLAND - MARCH 23: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge speak with staff during a visit to the Covid-19 vaccination centre at Westminster Abbey on March 23, 2021 in London, England. (Photo by Aaron Chown - WPA Pool/Getty Images)
LONDON, ENGLAND - MARCH 23: Catherine, Duchess of Cambridge speaks with staff during a visit to the Covid-19 vaccination centre at Westminster Abbey on March 23, 2021 in London, England. (Photo by Aaron Chown - WPA Pool/Getty Images)