The presenter goes inside the now disused tunnel. I thought the programme may be of interest to members - although I see the BBC first showed this programme some years ago so it may already have been brought to members attention.
https://www.bbc.co.uk/iplayer/episode/m ... -episode-3
The tunnel segment starts at 34 mins and is about 5 minutes long.
https://www.rhonddatunnelsociety.co.uk/
Enjoy
