There are two heat shields, the upper one above the exhaust under the tin and the lower one between the exhaust and the bumper, but I agree some people call it a gravel guard. Google the part number. https://www.buslab.com/product-p/211707399.htm
As posted earlier here is the pic of my skirt/gravel guard. Presumably the CSP isn't affected as the bumper has to be moved out for the tow bar. Like your reversing sensors btw.
No longer fitted. I replaced the bumpers , they’re now fibreglass from http://www.nomorerustybits.com/ and I have a reversing camera.
