LONDON, ENGLAND - MARCH 14:  Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Harry and Prince Andrew, Duke of York attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK. (Photo by Geoff Pugh - WPA Pool/Getty Images)