Well tonys, I'm a Rover nut and I collect the David Bache's work: he designed all the cars we own. we have Classics RR, a SD1 2600 VDP, a P6 2200TC (my daily driver) , a series III Land Rover and two P5B Coupé (both are RHD silver Birch, one has an engine problem so doesn't drive) All the cars drive once a week at least.
When I was first fiddling with cars, people in the trade down here referred to those as Jesus clips. This was because people often tried to remove them by lifting one side with the end of a screwdriver. It was named after the exclamation that was often made when it flew off and disappeared.