Every autumn, millions of people around the world come together for firework displays, feasts, prayer, and festivities in celebration of Diwali - the festival of lights. Millions of clay lamps illuminate homes and public spaces. Floors are covered with cheerful rangolis to bring good luck. With the food, family and festivities, Diwali is all about the experience of coming together, and the vibrant spectacle of colour and light, but the global pandemic changes how we celebrate this year. See Amish Tripathi, author and director of the Nehru Center London, in conversation with Neil MacGregor, art historian, broadcaster and former museum director.