I was wrong, or premature, regarding the picture of the Duke being ticked off for not wearing a seatbelt; it took a brave copper to do that, though, and well done that man or woman.
I was astonished to find out that he was driving again two days after the accident. That he was driving without a seatbelt, though, shows that either he has balls of steel, or he showed a serious lack of judgement. Since the Freelander rolled, I would have thought he must have been wearing one then to get away without injury, and in those circumstances I'd not have ten per cent enough courage/stupidity/stubbornness to drive unbelted two days later.
As for his judgement, the whole accident episode has been, rightly or wrongly, a minor PR disaster, and to compound that by committing another, albeit minor, motoring offence so soon afterwards smacks of insensitivity at best. If his judgement while driving is of the same standard, perhaps it is surprising only that he has not had an accident sooner.
As for the consequences of the accident, in this case if the police investigation concludes that the Duke (no, not David Dickinson, silly...) was responsible, on the reported facts so far he should be charged with careless driving/driving without due care and attention (the same offence nowadays), and the case dealt with in Magistrates' Court, where if proven it would be a Category Two offence.
The standard penalty would be a fine of between 25% and 125% of his weekly income, and 5 to 9 points on his licence. More importantly, however, in view of his age it would, quite rightly, be very surprising indeed if he was not required to take a driving test.
No-one except the sovereign is immune from prosecution. Will he be charged? Will he plead, or be found, guilty? If so, what penalty will be imposed? These are not really matters in the public interest, but they certainly are of great public interest, and the media will be watching very closely.
Personally, I wish him well, but I think he should stop driving now.