Queen Camilla is set to “snub” Prince Harry during the duke’s upcoming trip, royal sources have claimed. The Duke of Sussex, 39, is returning to London next week for the Invictus Games 10th Anniversary Service. However, sources state that he is unlikely to meet Queen Camilla during his visit. Prince Harry will be in London to commemorate the 10th anniversary of the Invictus Games with a reading at St Paul’s Cathedral on May 8. There is a possibility of a brief meeting with his father, King Charles, before he attends a Buckingham Palace Garden Party on the same day. But sources claim the chance…