I get a lot of approaches from people who want to film at Cwmystwyth, but having just watched this one I was very impressed by the quality and professionalism. As such I have advised the producer of willingness to work with him in the future and we may well see some underground ones. I have advised him to get individual BCA membership and I can then take him underground, so watch this space.

In meantime, this is worth a watch, although all on the surface

https://youtu.be/ZW7KMXGUih8