This is unusual for us, normally our adventures start in the dark early hours and a pre-dawn drive to an early flight, so it’s odd to find ourselves kicking our heels at home waiting for the time to leave. But this journey is a 4pm flight, so it’s a train to London and tube across to Heathrow, a bite and a couple of beers in Terminal 5, and we’re away. We’re flying with BA this time, which is also unusual. The flight is fine, the only items worthy of comment being the quality of the food (good!), and the amusing fact that dinner and air turbulence arrive at precisely the…