Kirsty Young hosts coverage of beacons being lit around the UK and Commonwealth to celebrate the platinum jubilee of Britain's longest serving monarch.Carol Kirkwood, Gethin Jones and Holly Hamilton report from events taking place in Scotland, Wales and Northern Ireland, and Jermaine Jenas is outside Buckingham Palace, where senior members of the royal family will light the principal beacon. Celebrity guests join Kirsty to share their memories of meeting the Queen.The programme also reflects on the celebrations that took place earlier in the day, including an exclusive behind-the-scenes look at EastEnders and the pomp and ceremony of Trooping the Colour with its extended flypast.