The flash Mob might of worked better if they had advertised it say the week before and then possibly got on the train at Darlington and gotten off at the airport.
The station needs moving from its current possition to somewhere near the enterance road so that pax can get on the passing buses. Also the railway system could be upgraded to the system were you push a button if you want the train to stop, but who pays!
With the present station moved hangar four could be put back to aviation and possibly the skeleton of hangar five.