Presidents, prime ministers and monarchs from around the world will travel to London over the weekend to pay their respects to Queen Elizabeth and attend a reception at Buckingham Palace to be hosted by King Charles the day before her funeral. US President Joe Biden and French President Emmanuel Macron are among the most high-profile guests from overseas who have confirmed they will be attending. Heads of state and other senior foreign dignitaries will be asked to gather at the Royal Hospital, a retirement and nursing home for veteran soldiers in west London, and are expected to travel in grou…