At the last minute, I had a call from The Holt with news of my car. Up until that moment I was on my way back on the bus to collect my car, with the problem still unidentified. But no, plans changed, in one last desperate effort they had the car rigged up to all their monitoring equipment and had the engine idling over and discovered the problem. A faulty temperature gage in the engine startup whatsit meant that it was that the computer was incorrectly telling the engine that the car was running at -40° or something silly like that and so was thus pumping more petrol through and flooding the engine.
The dead battery was just the icing on the cake on Wednesday that meant that this time round the intermittent became permanent.
They have ordered in the parts and it should be fixed on Monday and even more exciting, hopefully not cost a small fortune!