I removed the 4 plastic clips at the top of the grille, and peered down behind the grille with a torch. I could spot 4 or 5 lugs going into the bumper.Does this mean that I will need to remove the bumper, in order to remove the grille? Has anybody removed or changed over their grille, and if so, what is the procedure?

 

After you remove the 4 clips, just give the grill a tug, upwards. You may need to start tugging from the sides, to make it easier. You dont have to disassemble the bumper.

 

TheTruthIsOutlander, just to complete mislovic's post: