I want to suggest when you go to unlock and unfortunately break the key in the lock.
Someone far away has a spare, maybe they can come Wednesday. Advise CF he can call your locksmith (you've precalled) if he wants but it's not urgent for you, unless the FC need access, so he'll have to pay and make secure. Hopefully locksmith will be understanding (to you) and offer a particularly personal rate...
Nice thought but can see it adding to his entitlement. Not that the story would go down well..."i parked my car in someone's drive and the evil op made me pay a locksmith to get it out...."