My employer has for years used pool cars as a means to paying out less in travel claims/mileage to its employees using their own cars. If I prang my own car on work business claiming 46p a mile or whatever it is to cover fuel, maintenance and insurance, then it is my policy, my excess, my problem.
If work insists that I use their car on work business because they think it will save them money in the long run, and then I prang it, whose problem is it? (never damaged a works car fwiw)
But as above, you should have something in your contract or works car policy that spells out the excess (in pounds not %) you should pay in ‘your fault’ accidents on work business.
I would also be highly suspicious that someone else has subsequently damaged the car. How could you check at the time and notice a tiny scratch by the foglight and not the rest of the damage? 😕 Or would anyone accident/claims/bodyshop repair-related like to comment on how you could bend the whole front end at ‘frontwards round a range rover’ parking speed? I’d be checking for paint/scratches that are not consistent with the wall you drove into for a start.