LONDON, ENGLAND - MARCH 09:  Guests including Jeremy Corbyn, Queen Elizabeth II, Prince Phillip, Duke of Edinburgh, Teresa May and Michael Fallon, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Phillip Hammond, Sophie, Countess of Wessex and Prince Edward, Earl of Wessex attend the dedication service of The Iraq and Afghanistan memorial at Horse Guards Parade on March 9, 2017 in London, England.  (Photo by Stuart C. Wilson/Getty Images)