Do you have a large pile of empty aluminium drinks cans nearby? At this time of year you probably do. And they’re more precious than you might imagine.

At the launch of the current-model Jaguar XJ, I was told the body contained around 235kg of aluminium, but only ‘around 50 per cent’ was recycled. Aluminium drinks cans are ideal for recycling, partly because they made of pure aluminium, but they’re hard to obtain in big quantities, according to JLR engineers.

The UK may well be putting well over a billion cans per year into landfill, madness in terms of reducing energy use. According to BMW, using recycled aluminium emits just 2kg of Co2 per kilo as opposed to 10kg for fresh production. By my maths, there’s around 14 grams of ally in a standard issue drinks can, so Jaguar XJ only needs around 17,000 cans (suitably melted down and upgraded to 6000-series grade with a few alloying elements) to build one new XJ.