I could not find a search Icon so forgive me if this has been posted many times.

Is there a UK supplier?

I could not find a search Icon so forgive me if this has been posted many times. sports games
Is there a UK supplier?

Look for local electronics stores or hardware stores that might carry batteries. Stores like Currys PC World or B&Q could have what you need. A UK-based retailer that specializes in batteries and may offer the specific type you are looking for.