Yes, a £4 or so umbrella from Primark.
I picked it up and hooked it on my wrist, then got distracted buying other stuff. Got to the till, paid for my goods then left and got the bus home. I didn't end up returning it
- by the time I'd realised I'd "stolen" it I'd already got on the bus.
In my defence I was a teenager (poor excuse) and felt too embarrassed to go back. Aside from that discrepancy, I have a clean slate!