There is something seriously wrong with the way in which your van is being maintained unless it has done 200,000 miles!
I have owned our current 2016 T6 (LWB 140ps T32 converted to a camper) since new, it's now covered 74,000 miles and the front brake discs and pads have never been touched. the rear pads have been changed but only because they looked rather worn on an MOT and I decided to buy new ones. In fact when I removed the old pads they would have done another 20,000 miles at least but with new ones to hand it was pointless not changing them.