The team journey around the breathtaking shoreline of East Anglia. Mark Horton investigates the perilous state of the seaside piers, including the pier at Lowestoft, which has been closed to the public since 1982. By contrast, the pier at Southwold has been renovated and the visitors are now coming back. And self-taught artist Alice Roberts tries to capture the unique beauty of Southwold, which has inspired generations of painters.