I'm a motorcyclist, bus driver and I have access to Google.
The decision is definitely open to debate, but it's not nearly as obvious as this article suggests.
What the writer fails to mention is that when the Lord Justice said "unacceptably high standard of driving" what he meant was it was unacceptable to think that the lorry driver should have to drive his vehicle with it's offside wheels in the air, being that the narrowness of the road forced the lorry into the other lane, or at least it was forced into the other lane at the corner.
The blame always lies with the person who could have reasonably avoided the accident and NOT with the one who disobeyed the Highway Code, for example, someone steps onto a crossing when you, in a car, have right of way and you hit that person, if you could have stopped but didn't, then it's your fault. Therefore, the only question is what each person could have reasonably anticipated the other to do and this is where the ambiguity come in. If the lorry driver should have presumed that the motorcyclist would cut close to the centre line, then he should have slowed down or stopped. If the motorcyclist should have anticipated that the lorry would cross the line, then it's the motorcyclists should have given more room in his lane.
My feeling is that the Judge decided that the motorcyclist was fixated on his line through the corner, and didn't properly assess the situation, whereas the lorry driver could reasonably presume that since the motorcyclist had plenty of space in his lane, he would maintain a sensible distance from the lorry. Therefore, it's the motorcyclists fault.