If this was during the weekdays, when the Military are working, you would have to call Donna Nook Bombing Range to arrange either your arrival to, or departure from the runway at North Coates, dependant upon wind direction.
So, on a Sunady, I won't have to contact any of them, even Donna Nook? I can just contact North Coates as soon as I get near?
A straight line would indeed be cheaper and quicker, but I quite like the idea of following the coast.