Turns out when they were washing the car ready for collection they were in the process of trying to scrape off a few flies when they pulled off a few chunks of paint from the body coloured bump strip on the front bumper instead.
They have obviously said they are going to pay for, and carry out fitting of, a new bump strip on their insurance.
Here's a piccy of the damage not to big but bloody noticable and defo in need of sorting out.

Cheers
Dave.