This month Meghan Markle and Prince Harry will start their married life together in a cottage in the grounds of London's Kensington Palace. But thanks to the Palace's many other occupants - from tiny Prince Louis to the 82-year-old Prince Edward, Duke of Kent - they wonâ??t have this regal playground to themselves. We take a look behind the walls of the magnificent royal residence to reveal the grandest, multi-generational home in the whole country.