Derek Brockway is joined by archaeologist Dr Erin Lloyd-Jones and Onkar Singh Purewal NORTH Pembrokeshire and the Preseli mountains will be featured as part of the BBC s new series of Weatherman Walking: The Welsh Coast . Celebrity Derek Brockway will be exploring the Pembrokeshire coast in the second episode of the new series, airing on Friday 16 April at 7.35pm on BBC One Wales. Embarking on a 10-mile route from Newport to Fishguard, Derek is joined by archaeologist Dr Erin Lloyd-Jones and Onkar Singh Purewal (The Wedding Guru) as the trio explore all the stretch has to offer. “The Welsh coastline is spectacular, stretching for nearly 900 miles, and there’s a coast path the entire length of it, said Dereck.