They can say no and if its a perm one they will start asking about briefing rooms and all that good stuff.
And up North the flight ops inspectors in the main are seen around the GA scene quite a bit and within a month one of them will be through the base to have a look and if they don't like what they see you will be stopped.
Highland flying school started something similar in Stornaway and by all accounts it was very successful within a month they needed to get the old tower building setup as a briefing room etc.