I own a 2015 Discovery Sport HSE Black
I have just discovered there in no service level indicator in the vehicle information screen
so no warning at all
Is this normal for a young expensive car
Or is an option?

 

The system leaves a lot to be desired.
As the service becomes due, a service reminder message (eg: service required in 200 miles) will be displayed in the instrument cluster message center but for only 2 seconds after start up.
You can also scroll through the menu and pull up the service status under vehicle info.