If someone finds your lost item and reports it to us, it is essentially their responsibility to return it. Unfortunately we aren't responsible for your item whilst it is in the possession of the finder. If they do not return it, we are unable to recover it from them. If the finder has given us their personal details and your item isn't returned to you or us within 28 days, we may pass on their details to the police.
It is an offence to keep hold of an item that you've found that does not belong to you without attempting to get it back to its owner. If someone decides to keep your item, there isn't a lot we can do if they haven't gone through the recovery process and provided us with their personal details. If they have, we can pass on those details to the police if necessary.