Brass Yale keys on red keyring, Oxford

I lost my set of keys yesterday around 5:30pm after I left the bus stop at Queen Street by the Covered Market on Cornmarket Street in Oxford. It's a standard brass Yale house key on a bright red silicone keyring, with a small silver USB drive and a tiny enamel penguin charm attached. There are about six keys in total, and one key has the initials 'AH' engraved on the head. The whole thing is a bit worn and has a few scratches. This set opens my flat, mailbox, and bike lock, so it's really stressing me out to be without them. If anyone found them, please get in touch—I’d be forever grateful to get them back.