Former British Ambassador to the United States, Sir Christopher Meyer talks to us about the upcoming US elections, the role of China, the UK under Boris Johnson and the future of the European Union. He explains the greatest challenges he faced in his term as Ambassador, including the 9/11 terror attacks, as well as the greatest leaders he ever met.   We asked:  Who will win the US mid-term elections?What is Joe Biden really like and will he lose to Trump in 2024?What relationship should the West have with China?Will we see a united Ireland?Does he actually like using Twitter? What was the greatest diplomatic challenge he faced?Which world leader impressed him the most?