07.18.2017 - By BBC Radio 4
Tom Holland travels north to mark the 1900th anniversary of Hadrian becoming Emperor, by examining the impact of his biggest legacy in Britain - Hadrian's Wall. We also take-off for Heathrow to learn about its Iron Age origins and ask if a mound near a car park in Slough could really be a Saxon burial site. Producer: Nick Patrick
A Pier production for BBC Radio 4.