Amazingly it is West Brom. I always used to think it was Oldham. When I lived up that way I used to go regularly and most of the time it felt like the highest as it was so cold.
The Rugby League ground in Oldham (now gone I think) was much higher and that was seriously cold!
I was always lead to believe it was Oldham until I got involved in a heaty discussion with a work associate. We looked up the information and found it to be West Brom.