I have nailed this Heathrow thing, I think, as I arrive at the airport at precisely the time I had planned, being precisely 2 hours before my flight, stroll into the priority check in, make one particular purchase from Jo Malone and buy my favourite guilty lunch (Leon’s fish finger wrap, I’m so English now) and then the gate is announced and I take my bulkhead row seat and peruse the menu (one meal, 9 hours? Jokers).