In our case we hit it with a hammer. Not sure that will help here; although could try tapping the key?That’s unfortunate, so I await Mel’s considered advice.
Assume you’ve used penetrating oil, and/or light tapping around the lock area.
If it doesn't open, I will cut it off myself, or find those people who lift anything, the unmentionables, too tight to pay a locksmith, I am a Jock after all.In our case we hit it with a hammer. Not sure that will help here; although could try tapping the key?
Locksmith?
Mel