Aaaaaargh. Happened this morning on the M6, I have been driving this route for 9 months in various hire and loan cars and nothing has happened before, finally get my own car again and Sod's law intervenes! 
Luckily it is at the top right of the screen and small at the moment so will get lease company to fix it.
Luckily it is at the top right of the screen and small at the moment so will get lease company to fix it.