Anyone know this? It was extant in the early 70s, even before the famous MP for Bexhill and Sidcup and former grocer, Edward Heath, became Britain's first invisible backward-facing Prime Minister. With has the chorus Don't try to peer through the holes in the glass/ Speak at the opaque space provided, and including such poetic gems as One day as football was turning to cricket/And the roar of the traffic was drowned by birds, it tells the story of John Green, grocer, who loves his work but can't stand the public; inspired by a railway ticket office, among other things, he installs an opaque glass screen on his counter with a little slot at the bottom to pass out the goods.
Mike James used to sing it at the Fitter's Arms, Walsall. Sounds a bit like a Leon Rosselsson song, but I don't think it is.