iirc you have to undo the 2 screws fixing the plastic trim immediately above each grill.
Remove the trim & place your hand through the gap to pop the clips that fix the grills to the car
Are you talking about those two torx screws either side of the bonnet catch Simon?
Actually Dan after you've removed the 2 screws rather than remove the trim you might find the front panel containing the grills will pull forward away from the slam panel & you shove your hand in that gap?
I'll have a go, will report back shortly!
You sir are a scholar & a gentleman!
Removed all 4 of the upper bumper screws & it pulled away plenty for me to get behind it & unclip them.
As a "Brucie Bonus", the silver surround also detaches from the grilles which is exactly what I was hoping for.
No masking required so let painting round two commence!