Huw @treadsandtrails is on BBC 1 Wales Friday April 06th 2022 at 19.30, Weatherman Walking Series 12 Episode 3 - Brynmawr to Abergavenny, showing Derek around Clydach Gorge waterfalls.
Or watch it anytime on BBC iplayer
Treads and Trails on BBC1 Wales
Updated: Apr 12, 2022