It is all well and good having 1 local for the whole of the North West, but Manchester and the other local stations have different sports programmes for their local football teams.
Radio Manchester covers 6 teams from various leagues, plus all the local clubs from all the other leagues below league 2. If radio Manchester had to cover for all the other teams there wouldn't be enough time to cover for all of them, if they are all playing on the same day.
Radio Merseyside will probably cover both Liverpool clubs possibly Blackpool as well, as those other clubs in the lower leagues below league 2.
The same would apply to radio Blackburn who cover both Burnley and Blackburn.
So if there was only 1 station cyberblue, there would be no time to have a commentary on any local clubs, as they would just spend all the time going around the grounds for an update and for the main points of interest that had happened since their last up date.