I would always keep anything I found, whether it be £1 or £10,000.
Better in my pocket than the police christmas party fund.
Yeah, it's a pretty selfish attitude really. Not sure why, because I'm not selfish in the slightest usually, but I just have a lack of faith that it would ever get back to who it belongs to.
Was in Tesco on Church Road a few years ago when my son (about five at the time) said: Dad, what's that on the floor by the trolley. Looked down to find I was standing on £200 in £20 notes, done up with a rubber band.
It wouldn't have set much of an example to the next generation if I'd punched the air and shoved it in my back pocket before heading for the vintage wine section