Just an update, the car has now done just over 8,300 miles and the variable indicator service warning comes on whenever I start the car, cancel it by pressing multi-function on wheel. Variable indicates service will be due at 9,000 miles!!
I'll be keeping the car for 50,000 miles hence the reason for having 12.5k services and will be asking the dealer to switch variable (or how to shortchange the owner) off.