What is it with the British road network and the first hint of inclement weather? Last year Gloucestershire got locked down by the first hint of winter, and this time its Oxfordshire and Buckinghamshire that have fallen into gridlock as the first flakes fall.
Granted, the crash that shut the M40 this morning couldn't have been predicted. But the fact it was going to freeze last night doesn't seem to be beyond the predictive reach of modern meteology.
But despite listening to the Highways Agency's strenous denials on every traffic bulletin, I can confirm from personal experience that most of the diversion 'A'-roads showed no signs of having been gritted, with everything from thick slush to sheet ice in evidence.
Editor Hallett's Jaguar XF did a decent job at coping with the treacherous conditions, especially with the transmission kenneled in its ultra-sensible 'winter' mode, but the stability control light still got a decent workout.
But after three hours travelling 20 miles, I can't but wonder at the quality of some driving - especially that of the growing number of people who seem to regard ESP systems as some kind of get-out-of-jail-free card.
On the plus side, the XF has never looked better than it did in the brilliant sunlight, surrounded by fresh snow.