This is simple, dont pay people to tell you how:
With the ignition on, Press the end of the wiper stalk until miles to service appears on the dash screen.
Now, press and hold the mileage reset button on the instrument binnacle for more than 5 seconds, it will start to flash. Let go
This will reset your miles to service to the factorysetting and get rid of the flashing spanner !
Hope this helps a few people.