I remember reading on a forum ages ago that someone needed an MOT but they had a cracked windscreen, so they removed the windscreen and the wipers and it passed, albeit with some raised eyebrows.
Made me wonder what other wacky things you can get away with. I know very well from having an MX5 that if you cover something up they aren't allowed to remove the covering to check it so just have to advise something was covered. The E30 passed with rotted out sills in 2017 because the sill covers meant inspection wasn't possible.
If you have an ABS light or something you can remove it and wire in a lamp which comes on and goes out after a couple of seconds with ignition, as long as it is labelled that it is for the ABS...
Front foglights don't work? Cover them up, and the switch... High level brake light doesn't work? Take it out. Rusty brake line? Cover it up...
Of course, don't actually do these things. Fix your ****. But it just goes to show the whole system is flawed if you know how to get around it. Rotten cars full of filler is another good example.