<p>On shift, but out of sight – from ‘that person with the table tennis bats’ on the airport tarmac to remote signallers managing rail traffic</p><p>Not many people get to park their car here – bang in the middle of Heathrow airport, on the taxiway just a stretch of grass away from where a line of passenger planes is coming in to land.</p><p>It’s close enough to see the shimmering air and smoke as nose tyres hit the tarmac. “An A380 will put down as much rubber as a car’s entire tyre,” Jack Quan