I've found a small plastic panel is missing inside the wing of the 45, on the drivers side. I removed the passenger side one and looked at the part number. Looked up the part, and it's Ã‚Â£2.38 including vat. Excellent thinks I. So I look up the mirror image part to fit the drivers side. Just the same size, shape and so on, simply handed. Go on, take a guess.
Check out CLG100231 and CLG100221.
I guess I need to find one in a scrappers, if I ever get time to visit one. AAArgh