It has been mentioned about the obvious pre-flight preparation, taxi tests etc. It would be naive to think that there will be no spotters waiting for the first sign of movement let alone first flight.
It would be equally naive, although this is apparent in other spheres all the time, to ignore the speed of modern communications.
A stray bird is spotted and the cars arrive in minutes. 558 moves and people up to 50 miles away could be there in less than an hour. At my local airfield there are always cars in the car park watching and waiting 7 days per week good weather of fowl. (sic) In fact I would not mind betting they are there now. There will be people near Brunt with Airband receivers tuned and internet connections open ready to broadcast to the world.