Trying to return a key left in my new Zafira Tourer

[KeyleftinCar]

I bought a new to me Zafira Tourer this week. There was a key left in it that I'd like to get back to it's original owner. I know this is absolutely a long shot but I figured it's worth a try. Car was bought from a dealership in Leicestershire.

Give it to the dealership. They will know the address of the previous owner.

Surely you just contact the dealership tomorrow and they help find the owner?

I have already been in contact with the dealership and they're being extremely unhelpful unfortunately. Just said it wasn't theirs and wasn't interested any further than that.