William Hill is ok. When I was living in Belfast, i once won 2000 Pound. And you could collect it also in shops. Like I did, then it turns out that some did not had that kind of money, then i went to the city. There was one that had the money, but only in coins.
So i was walking with 2000 pound in coins, went to HSBC, and they did not take coins in the branche. I still find this ridicilous. But accross the street was a Tesco that accepted coins with a fee. Never forget that day.