Just done the front ones, 20mins, but a lot of that was spent firstly not realising the plugs in place needed to be loosened off by pushing a pin in the middle, and then they took a fair amount of time to pull out without breaking them. If the middle pin falls inside the wheel liner simply pull the liner up and get them out.
The new ones clip on top and utilise those two clips, used a self tapper to secure the inner most piece to the liner, and another one to pull the top in closer as the clip still leaves a bit of a gap