The shadow chancellor Ed Balls is currently making as much ground as he can out of his 'wrong time, wrong place' campaign regarding the government’s proposed 3p-a-litre rise in fuel duty next January.

He knows full well, of course, that he’s pushing on an open door as far as the rest of us are concerned – because no one WANTS to pay more for their fuel at this moment in time, even if we’re aware that we may be robbing Peter to pay Paul in the long run.

But here’s a thing; does it actually matter if the government puts the duty on fuel up by 3p a litre when you can save four times that if you’re prepared to shop around?

If you’re an HGV driver, or more to the point a haulage company to whom every mile is critical, the answer is very clearly a yes. It matters. You can’t just haul your rig off the M1 and into the local cheap garage to seek out lower priced fuel, after all.

But of you’re a car driver, it’s different. This week I’ve filled the Jaguar XK RS that I’m lucky enough to have been lent for a while twice. On both occasions the low warning light had come on, which meant there was about a gallon left in the tank, so 60 litres of space.