Sunfish is right, the PS knows exactly how to shut this down, by encouraging the maximum number of industry organisations to participate. Then create somewhere they can continue to argue, it could be called the UNGAA, standing for the UN General Aviation Assembly. Then it has the maximum amount of people it can use to stir up the fights between the members, cause confusion, make the whole thing completely and utterly useless and impotent. Just like the other UN.
Best thing to do is to have the agreed list of demands prepared, walk in, drop them off, with a draft copy of the flyers that will be distributed in his electorate during the next election campaign. Then head off for an early lunch, before the minister does. If you sit down for any form of "workshop", it's sayonara to any change.
Don't believe me? You might believe history's greatest public servant, Sir Humphrey: