Well my local dealer took the car in today and replaced the pulley and belt on the alternator.
Had the car for all of an hour and now the car with the spanner light is on! So it's either an engine electronic fault or a gearbox electronice fault. The car is now in limp home mode and gutless.
This is the most expensive car iv ever bought and this is the second problem iv had in just over a week.
Im hoping its just a connector been knocked out while doing today's work. If not i think ill be refusing the car under Network Q's 30 day scheme.