...nooo... I don't like Pm'ing people - it feels instrusive lol. Does he mind?
Also - just been out to the car - AND IT BLOODY WELL STARTED!!!!
So, I think I've narrowed down the issue:
When it was failing to start, my red immobiliser light was staying on even after turning the key.
When it started just now, the red light went out when I turned the key!
So, I though the red light was meant to stay on when you attempt to start it - evidently not! So, I assume that this is likely to be some kind of immobiliser issue?