I am ashamed to say that the side chambers of hetty pegler's tump were so dark without a torch that the first time I went I was a bit freaked out and couldn't go in them.

Likewise, without a torch at Stoney littleton your arse will block out all the light while you're ambling down the passageway and you won't be able to see a thing.

Could be fun, but I think you'll appreciate it more with a bit of light maybe.