When Maricela Nuñez heard that Queen Elizabeth II had died, she burst into tears. Then, she booked a flight. The 34-year-old event planner from Mexico has flown more than 8,000km to pay her respects to the late monarch. The ambitious trip is about commemorating Queen Elizabeth. But it’s personal, too. By being in the UK for the Queen’s funeral, Maricela fulfils a promise she made to her own dying grandmother. “Once I heard, I knew… I had to be in the UK. I had to go to London,” she says. “I knew it was something that I had to do.” In pictures: Balmoral, Buckingham Palace and Windsor Castle fil…