Furthermore,even in a Spitfire it does not take very long to get to Scotland!!Gillan did it in a Hurricane Prewar in about 45 minutes.Therefore having flapped about trying to get your head straight,and having no one else in the same bit of sky after it being full of aircraft a few minutes ago,your mind will wander,and get you disorientated.Above cloud your mind will definitely give your strange ideas,as these guys were not well versed instrument fliers,let alone full IR Rated Master Greens.You have to think of them as no better than student pilots just having got their wings,then equate that experience to your own at the same stage!Now how good were you ,adding the stage fright,adrenalin rush,shaking knees,clammy hands,no one to follow -----what fuel left??The wind has only to be 30 odd degrees off plus another 20 knots as you were quite high still and off on your merry way to the north would be very easy.