Election day - keys found in St Alpheges

Someone has given me some keys they found at St Alpheges on Thursday, probably lost by someone voting there.

Please PM if they are yours. On a general note, should I hand them into the police? And where would the nearest station be, I'm thinking Kennington?

Thanks!!

Southwark Police Station in Borough High Street would be the nearest

(Kennington Police Station is part of Lambeth borough police, so St Alphege isn't part of their territory)

Of course it's the one on BHS, silly me! Thanks James.