Grille coming loose

[Bry]

Hello all

Has anybody had any issues with the X type facelift grille working loose ?

Not too easy to explain but two of the four bolts have allowed the grille to come loose and it rattles like hell

Both on n/s of car one bolt completely loosened but not falling out whilst the other is still tight.

My question really is how does the grille attach to the bonnet as it's right on the lip.

Not too keen to remove it completely till I have some more detail

Any help would be appreciated

Thank you

Brian