There are the following bolts to undo:
2x 10mm bolts on the outer side of the bumper, near the top where the bumper brackets meet the wings
2x t20 torx bits where the very corner of the bumper (small flap) screws into the wing, visible from inside the wheel arch
2x 10mm bolts under where the headlights sit
2x 10mm bolts on the underside of the bumper where it bolts onto the lower cross member
2x t30 torx bits where the bottom bumper screws onto the arch liners
obviously when i say 2x it means theres 1 on each side of the bumper.
copyed off willsy post .