By Jessica Gibb & Chiara Fiorillo Prince Harry will likely spend “a great deal” of his time in the UK alone as his army and school friends have become distant, a royal expert has claimed. The Duke of Sussex, 39, will travel to London next week to mark 10 years of his highly successful Invictus Games. The ceremony will be held at St Paul’s Cathedral on May 8. It has been claimed Harry will check into a hotel room alone in London during his trip instead of staying at a royal residence or visiting friends. Royal author and expert Tom Quinn claims it is possible that he will not meet any of his ol…