Where are potholes at their worst? I know, bleedin’ everywhere at the moment.

But when it’s not bleedin’ everywhere, where mostly do you find them? My reckoning is: near junctions, places where trucks go, places where we stop and start.

There’s a reason for this. A day with the brilliant Kiwi race instructor Rob Wilson is insightful for many, many reasons. Coach to about half of today’s F1 grid, Wilson tends to teach his racing techniques at Bruntingthorpe test track.

Potholes: how much they cost the UK and how they are fixed

During the day, he’ll take them to an area of the circuit where asphalt is beginning to break up, to explain braking theory. And predominantly, when one finds the little marks as the track’s top surface begins to give way, it’s in a braking area.

Because even in a lightweight racing car with stiff suspension, as a driver squeezes the brakes, so weight is transferred onto the front tyres and they grip like anything as speed is dispensed. Wilson will point out that every gear downshift, even if a driver is good at matching revs, shifts weight on and off the tyres, perhaps 20kg, 30kg here and there, which all unsettles the car and adds length to its braking distance.