theres a scaffolding firm here in southampton with the slogan “make sure your next erection is in good hands” 
There’s a vertical blind company round here that says “Blind man driving”.
Hand written on the back of a trailer “■■■■■■■■■■■ is for life, not just xmas”.
It must have been a Cox long wagon with the slogan “you can do anything when your’e cox long”.
Or how about “If driven correctly, this vehicle must be stolen…Call police”.