Thanks. I ended up posting the picture to my profile instead of the thread at first, so there were some comments there In answer to the question...
That's the problem with lockdown, there is nothing better to take your mind away from the annoying things you can't find. Well, I found it, and...
Sorry if I'm posting in the wrong place. I remember seeing an image, probably on tumblr, of a cage with a silicone penis covering it. It wasn't a...
D'oh. Just realised it is a PA lock. Not having a PA it didn't register at first - I thought it was some way of locking around the existing lock!
Sorry for my stupidity, but how does the additional lock pictured fit onto the the cage in the original picture to make it more secure?
I've messaged you.