Watch HDToday. Give them massive numbers, that’ll impress them. The Secret Life of the Long Haul Flight (Channel 5) is one of those documentaries that does that, right from the off: each year, 300 million passengers fly more than 6bn miles on long-haul flights. Some of them on an Airbus A380, which costs £280m, carries 484 passengers, is 73 metres long, 25 metres high ...