From 15 mins, although programme starts with Ffestiniog Railway:
http://www.bbc.co.uk/iplayer/episode/b0888fjb/weatherman-walking-series-10-1-portmeirion-and-dolaucothi
Mike
http://www.bbc.co.uk/iplayer/episode/b0888fjb/weatherman-walking-series-10-1-portmeirion-and-dolaucothi
Mike