So, a lot of people here seem to be saying that you should be reaching NSL on a wide road in good conditions, otherwise you are driving dangerously? So if I am driving at say, 50/55 that would cause consternation?
50? Probably. 55? maybe not. Are you also aware that most speedometers are off, so your 50 may be closer to 45?
And if I am at driving at say, 45 on an extremely bendy NSL road, perhaps in bad weather, that is also dangerous?
What don't you understand about the "in good conditions" part? Don't be obtuse.
If I have understood this right, then I have to say I am confused, because it is going against everything I have been taught in my (recent) driving lessons. I have been taught that the NSL is there as a LIMIT not a TARGET
Yes, that is incorrect. It is, in fact, a target. You should be driving at the speed limit unless there are reasons not to.
and that I should be judging the road on the possible hazards it may present (bends, narrow, poor visibility etc).
That is correct. Those are the "reasons not to" part.
I have a rear view mirror - I can see people approaching - and they can see me.
I'd bloody hope so!