ITV St David's: Britain's Smallest City Catch up on the ITV Hub Documentary. St Davids in Pembrokeshire is officially Britain's smallest city with a population of just 1,841. Despite its size, the city of St Davids has a big character, with a deep history and breathtaking coastline. 2 episodes available to watch Share this programme: Copied to clipboard Share on Facebook Share on Twitter Copy link to share Series 1 Latest Episode 2 The summer holidays bring thousands of tourists to St David's. Episode 1 Following the locals of St Davids as they cope with their busiest tourist season ever.