Interesting comments guys, Mr AA said that the car was safe to drive till Friday as long as the fault did not reappear and driven 20 miles today with no issues or warning lights. Rang to book the fault in and the first thing they asked me was the fault code number and said exactly the same as Mr AA, that it is safe to drive etc. Drove steady to work, no high revs, all those souped up astras and corsas got a kick out of flying past me today! But i'll be back!!