The doors at the Actress are closed BECAUSE they have extended hours and have to comply to keep them. It maybe you can get the Exhibition to clean its act up by letting it have extended hours. However this is a residential area its a 'local' pub. Maybe one late night a week say till 1 (and no relaxation on bank holidays) might be acceptable but this application is over the top. Frankly I don't see the Licensing Comitee allowing it, but you should campaign to give a clear message. And you can attend this committee.