Not aware of having hit anything on the drive to work and am positive the car wasn't like this when i parked it in the morning

My question is this; there is no easy way to get to the rear of the grill to try and fix it back till i find out what replacement parts will cost, there seems to be an area on the under skirt/spoiler which may bolt off and allow access. Do the panel bolts have spring washers or such like inside; if i undo the panel am i going to have the devils own job to fix it back securely?
The grill is forced in about 1/2 inch to 3/4 inch in old money, i can't pull it back in place and clip it from the front, it seems to need assistance from behind.
