If the GAMA KingAirs and the Learjets referred to are not on public transport flights (the patients don't pay a fare - yet!) they are under no obligation to be bound by the declared runway lengths for licensing purposes. And it is in any case no part of the council's job to tell any operator whether the runway is long enough for them. If GAMA requested use of the airport they will be well aware of the NOTAM announcing the reduced runway lengths and will no doubt have taken them into account if they need to.
Amazing how quickly this thread has defaulted to The Latest A&BC Buffoonery.
But for the avoidance of doubt, Oban's still one of the best flying experiences in the UK!
NS