Its just an easy unbolt job, all the bolts are torx bolts (T20 iirc). First you need to remove the bolts in the rear wheel arches theres 6 each side. Then remove the two bolts on the bottom of the bumper (ones easily seen the other is hidden by the tailpipes). Next undo the boot, you need to remove the plastic trim between the boot and bumper, this is done by undoing the torx bolts first one each side to the side of the rear lights, once undone lift the plastic trim away (this is velcro and sealed down so will take a little effort to lift/remove). Once removed you can see the last three bolts, remove these then the bumper will pull off.