<<Getting the most from a single runway needs great cooperation between the controllers in the tower and those working in approach to interweave arrivals and departures.>>
I think I have just come up with a winning idea... Why not have the approach and radar units at the airfields so that the controllers could have validations for TWR and APC? Wouldn't this give everyone a better understanding of the other side of the job? Expect somebody has already thought of that...