It turns out that Lewis Hamilton has, so far this year, been driving his Formula 1 car without a drinks bottle aboard.

It seems that this year’s Mercedes F1 car is a touch overweight and that Hamilton volunteered to go without the bottle, which brings the car a couple of kilos closer to the 728kg minimum that the cars can run at – or it lets Mercedes ballast the car precisely where they want to, to improve the handling.

Maybe it made the difference in the Spanish Grand Prix the other week, and the adequately lubricated Sebastian Vettel could have held Hamilton at bay if only he’d been prepared to be thirstier. Or maybe not.

Anyway, when it comes to going fast, weight counts – and on a circuit, losing weight is the virtuous thing that keeps on giving.