It might give an idea when this location was last visited as it clearly wasn't yesterday. Chris.

https://www.examinerlive.co.uk/news/real-life/tributes-paid-always-smiling-dewsbury-28572764

Oh, that's a pity. I did wonder however as we'd not heard from him for a while. Definitely a joker! Chris.

I didn't know we had actual volcanoes so close to the UK so recently! Chris.

In some circumstances I agree. But if I was looking for an image for a website, I wouldn't be paying an artist, I'd pinch something from somewhere. Chris.

Why? Chris.

I closed my eyes whilst doing Titan. Chris.

I'm with hannab - they could keep their £250! Chris.

Caps are small explosive charges. Perhaps the 'capping' terminology is a bit niche. Chris.

From here: https://www.bbc.co.uk/news/articles/c878en33yd8o I enjoyed this bit: "They had to navigate narrow tunnels and at times use small explosive charges to get her out." - the explosives bit reminded me of cave exploration in Yorkshire - if it's not big enough, blow it up. Chris.

Depends on what you consider decent. There are some good mines in the Gwydyr Forest, Parc, Hafna and Pandora for example. Aberllefenni - Foel Grochan (red crane entrance) is pretty good too. Cwmorthin and Maenofferen have a lot more to offer than can be seen on a single trip, as does Parc. Chris.

I bought a commercial one for about £1000. There's probably a reason they are so expensive (aside from the fact it does O2, CO, H2S and CH4 as well) Chris.

I agree. They should be onshore. A bloke in a ratty transit with a spanner is a lot cheaper than a boat. Chris.

I am assuming you know the way! As all leaders ought to (or if not, it's an exploration trip where retracting steps is always an option) Chris.

Not being able to exit from Rhosydd is disappointing. You don't need to climb the quarry, and it's only 30 mins tops from the Croesor Rhosydd boundary to the exit from the 9 adit. Then 30 mins to raise the alarm from there. Stuff going wrong is fine - it happens to everybody. But being unable...

I would not be worrying about being shot! There are laws about that. Chris.

Anywhere on high ground in Swaledale or Wensleydale. Or Arkengarthdale. Chris.

Worked for me just fine. The geographical location of CATMHS seemed a bit awry though - I felt it ought to be in the Lake District somewhere. Chris.

Not looking hopeful... I might suggest to the interested parties that they wait until next year when we might be in Yorkshire, the Lakes, or North Wales, where there are options... Chris.

Thanks Chris. Interesting. Seems like there's potential. I wonder if the sump rises and falls with weather conditions, so a well timed visit might reveal something more. Chris.