All the EPL teams have undersoil heating so it's pretty rare for snow to be an issue, just if it snows on the day of the game. If there's major snow forecast on the day of the game it'll end up with the game being postponed to stop people having to travel. So I'd guess they dont have ploughs because they'd hardly ever be needed.
Unrelated, looks like Neymar has a serious ankle injury, ankle all twisted at an ouchie angle