I think your looking for a smoking gun that isn't there........
THe one thing that having councillors on the board will have done is inject a rather large dose of reality into their thinking (councillors that is!), when they get to see the cost - v - revenue and unlike the local council they can't square the circle by just putting the council tax up i.e. charging customers more & more then they will understand that keeping the airport open is a major challenge, frankly I am amazed its still open.