To some he's a teetotal, vegan forager, and a rallying point for Welsh national identity- to others he's a saint with a spiritual message still relevant for today. Roy Jenkins visits the St Davids Cathedral to discover more about Dewi Sant, man and myth, and the cult that grew up around his supposed remains. In the company of the Dean, the Revd Dr Sarah Rowland-Jones, and the Canon Chancellor, Revd Dr Patrick Thomas, Roy Jenkins explores some of the nooks and crannies of the Norman building to find out how David or Dewi became Wales' patron saint. Dr Martin Crampin offers insights into the visual record of St David, whilst the present-day Bishop of St Davids, Rt Revd Dr Joanna Penberthy, explains what St David means to her.