I put the flash little one from Muddy Mods or something like that on mine.
Very nice it is too although cost more as I remember but that was years ago. When I used to spend money on it.
Only if it breaks and causes an accident where someone is seriously injured or killed. Many years ago I remember having tow bars fitted at some guys house. He had a cottage industry making and fitting tow bars at the weekend and I can't imagine type approval was an option.