By Scarlett O’Toole Meghan Markle will not be joining Prince Harry when he returns to the UK next week and one royal expert has slammed her “sad” decision. The Duke of Sussex will visit London on May 8 for a special service to celebrate the 10th anniversary of the Invictus Games. He will give a reading during the event which will take place at St Paul’s Cathedral, the same place his parents got married. Royal commentator Charlotte Griffiths believes Harry will be “so lonely” without his wife and said the decision is “so sad”. She also suggested no senior members of the Royal Family will be by …