The driver of a white van from London was lost somewhere in the Black Country*. He stopped to ask a local man standing by a canal bridge, "Is there a B & Q in Wolverhampton?"
The man by the canal bridge thought for a minute and replied: "Dunno, mate, but I know there's two Ds in Dudley!"
*The Black Country is defined as that part of the West Midlands conurbation that isn't Birmingham! Used to be black as industrial soot, hence the name.