Having attended the commemorations in France for the 100th Anniversary of the start of the Somme as part of the BBC’s coverage, Dan Snow hurried back to the Chalke Valley to give his own thoughts and perspectives – not only on the battle itself, but also its enduring legacy and his own reflections on what he has witnessed in France two days earlier. Recorded at Chalke Valley History Festival 2016. www.cvhf.org.uk.