I was talking to a local acquaintance last night. We got onto the topic of what the local new years eve plans would be this year. He told me that one year, a load of his lot went to some 'ex-munitions bunker' in Wales. He said it had a low slate roof in parts, but couldn't remember if it was in Llanberis or not as he was 'mashed'.
Does anyone in the know know if the site referred to in this thread could be the one that he spoke of? Does it have a low slate roof in parts?