This gives you the rough idea.. (not my pics but v. useful!)
Start by removing the small philips screw near the inside of the grille:
If you reach into the hole where the screw was, you can pull the grille out. Stick you finger in and sort of wobble up and down while you pull..
It pulls out from the inside (centre) of the car outward, and 'hinges' on the side close to the wheel..
Shows the horizontal holes where the tabs on the back on the grille clip into..
Doddle!