Update guys.
Have reset the SMG and using car today to see what happens,have just given it some beans in sport,Mtrack mode,wow what a car.
No sign of any warning lights yet.
The car is still booked back into Coopers Tunbridge Wells for Monday for full check over as i have no confidence in the car at the moment. Of course if it fails over the wekend then it will be left with BMW until fully sorted.
BMW said as it seems temperature related they suspect one of 3 temperature sensors on the gearbox.
To be honest i want it to do same thing this weekend,as something is not right for it to have done it in 1st place.
New i should have got an RB320