Buckingham Palace has been home to kings and queens since 1837 and is one of the most famous buildings in the world, but behind that grand facade lies a hidden paradise. At 39 acres, it is the largest private garden in London – and less formal than you might imagine. In an exclusive tour, Alan Titchmarsh explains how the garden has evolved through centuries of royal tastes, and explores some of the hidden corners of this very special space. Watch the full video now on our YouTube channel, or lis