Thanks for the replies
I have instructed the garage to go ahead and replace the ecu.
I had done this before the replies,
The story from the garage was the ecu had got wet, (not sure how)
And the unit had a fault and would need replacing, I asked if it would dry out would it be ok or, do you think itís a loose wire or a faulty sensor? They informed me that they didnít know what the problem was because their machine could not read the ecu (thus needs replacing), then informed me that once its was changed there was no guarantee that it would cure it. also I asked what the availability was on getting these ecu , I was told they wouldnít know until they ordered it, after chasing them Iím told that there is one in the uk and it will be soon, they have now had the car for over 2 weeks.