what i did was undo all of the top screws that are under bonnet and then the long black piece of plastic above the middle grill ,pull it forward,its fairly flexible and it wont snap.so now ur basically pulling the top of the grill and bumper away from engine bay.this allows a gap then.
i then got a long screwdriver and located the clips and just hit the screwdriver with a hammer and snapped all the clips
pulled out the 2 grilles
and pushed the FR ones in job done