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“It stands to reason that gains can be had by slipstreaming and combining efforts in the sky. And any innovation in the cargo space is good.”

In conjunction with these media campaigns, there are invariably conniving politicians slipstreaming along, eager to advance their careers by latching on to popular prejudice.

Seven times Formula One champion Lewis Hamilton joked on Saturday that he might take his iPad into the cockpit with him at the Italian Grand Prix for entertainment if he gets stuck in a queue of slipstreaming cars.

Macau is characterised by a long pit straight, on which slipstreaming is a key part of racing, and a tight and demanding back part of the circuit, as the cars twist and turn through the city's hills.

In qualifying on the high-speed, low-downforce Monza, gaining a tow by slipstreaming the car in front is vital, worth almost three-tenths a lap.