I doubt the authority will listen to anyone else from outside their area.

Well, if everyone outside of their area shares your doubt - my Licensing Authority won't have anything to listen to, will they?

Whether they actually listen or just go through the motions - the Licensing Act 2003 (currently) requires every Licensing Authority to review their SOLP every three years. Part of this process is a formal public consultation which every member of the public and all national organisations are invited to contribute to.