Much to my surprise I was informed that the rear brakes on my 2007 Ford Mondeo had worn down to the metal and required new pads and discs even though it had only done 22,000 km and the front brakes were ok. Ford told me that it was normal wear! This is my first and last Ford; I will go back to a Hyundai next time.
It's most unusual to wear out the rear brakes before the fronts as it's the fronts that do most of the work, but having to replace pads and discs at low kays is not so unusual with European cars.