Evil8Beezle:
You may as well be saying that YOU have never ever made a mistake or done something silly, which we both know wouldn’t be true…
I’ve done a few things in my time and thought afterwards, that was rather stupid! 
It’s life and we all screw up from time to time…
Yes it appears that driver made a silly mistake, but I can assure you that warnings about not parking on soft verges isn’t in the HGV driver training! Yes it’s common sense, and I’d reserve judgment on that driver until the phone rings and he tells his boss he’s done it again! 
A driver at a place I’ve worked made a drop to a horse riding stables, and to get out, decided to reverse onto the riding arena area. let’s just say it didn’t go well and his truck had to be recovered!

Now that driver (a full timer) didn’t appear stupid to me & had done the job for 4 years, plus his old man drove for the firm as well.
But he still made the mistake, which I’d suggest was down to complacency!
I’ve made plenty of mistakes, some of them quite embarrassing looking back at them now but I wouldn’t pretend otherwise. Also I’m not suggesting he should have the book thrown at him or lose his licence. I merely offered my opinion on what he’d done and question why something so incredibly basic as a soft grass verge is being excused away as if anyone could or would do it, when that’s just not true.
I personally see a big difference between a lad in a farm yard, trying to turn around or maneuver to where they want him to tip, clipping a fence, wall or sinking in to some soft ground, compared to a driver who for no good reason decides to leave the safety of a solid road and take it upon himself to drive on to a soft verge, lose control, get his truck bogged down and end up costing his company several thousand in recovery and no doubt the local council will claim for verge/ditch damage repair as well, all for what? This was just so pointless in the first place, there was no sane reason for him to have done what he did. All he had to do was drive down a road and stay on the tarmac, but no. If your mate was already at a riding stables then the situation is a bit different, he’s supposed to be there and he’s going to have to turn around somewhere. Had your mate not supposed to be there and just fancied turning in because he thought it would be a good idea to do something a bit maverick and then got stuck in a complete strangers paddock, then yes, foolish person. But that’s not what happened.
What the Jenkinson driver did wasn’t unlucky or unlikely, it wasn’t a gamble with a good chance of going the other way. With a truck as heavily loaded as a walking floor bulker, it was always going to be exceptionally lucky if he didn’t get stuck by pulling off the road in such a manner in such a place. Its no more of an innocent mistake than hitting a low bridge, having a load of steel come off a trailer because you’ve only put two straps on it or rolling a truck on a tight corner at 50mph purely because thats the speed limit and assuming that its therefore safe to travel on any section of the road at that speed (I know a person who actually believes that if the speed limit is 60, all corners are designed to be gone around at 60).
My original post said he’d made a silly and naive mistake and the fact of his fully loaded condition elevated that to idiotic. I stand by that. We all have to act in at least a moderately responsible way in our daily lives and jobs. This man didn’t. It was a silly mistake, he probably won’t do it again, but that doesn’t make it any less silly this time and lets not forget that I’m only offering my irrelevant thoughts, I’m not the local traffic commissioner so my opinions don’t actually matter at all.