BBC Radio 3's annual Free Thinking festival of ideas continues its summer of activity as it takes up residency at leading summer events across the country. Anne McElvoy chairs a debate from the Daily Mail Chalke Valley History festival to examine how the British have looked to their history to give them a sense of national identity, and explores whether a sense of belonging and citizenship can be found from our past. The guests include historians Michael Wood, Helen Castor and Tom Holland and the MP and writer Kwasi Kwarteng.