Blackwall Water Butt
We bought a couple of water butts through our council when we first moved in. They're not yet connected up as we don't have a down pipe but I wanted to fill them with water to leave standing so that I can then top up the pond. The slight issue is that I can't figure out how to remove the lid at all. It's a Blackwall water butt - the same as the one pictured in the link:
I've tried turning it all kinds of amounts to see if there's a locking section but I can't find anything like that at all. I just thought I'd post on here on the off chance anyone might have one themselves and know the trick.