I have one .. ..
As a teenager, my father, who worked in the Trade Union movement, would often visit the docks at Southampton taking me with him for company. I was always amused at the then main gate to Soton Docks which comprised 2 very large brick pillars supporting some wrought iron framework. Within this wrought iron work was cast in lettering that read 'Southampton Gateway to the British Empire' The main ironwork was painted green and the lettering gold I think.
My amusement was that affixed to both brick pillars were the biggest ' No Entry' signs you've ever seen !!!
I have a photograph but I can't find it at the moment, maybe later.
S