Rating: Rating: Ever wondered what goes on in Britain's stately homes and castles while the doors are closed during lockdown? Chances are, Lucy Worsley is inside, singing 'wheee!' and skipping through the corridors in a jewelled gown. She's joint chief curator of some of London's most magnificent royal buildings, including Kensington Palace, the Tower of London and Hampton Court. Visitors are barred at the moment — but not Dr Lucy. 'I've got the keys,' she giggled, leading us through the gates on her Royal Palace Secrets (BBC4). Visitors are barred at the moment — but not Dr Lucy. 'I've got the keys,' she giggled, leading us through the gates on her Royal Palace Secrets (BBC4)