Remember the simple days when you got your gas from the Gas Board, your electricity from the Electricity Board and your phone from the Post Office? Wait, what - the Post Office? It doesn't sound quite so obvious in these days of multiple providers, myriad models and a bewildering array of packages to pick from. I bet the phones supplied by the London Telephone Service were big, black and hung in the hall. I took this photo a couple of years ago and I can't remember where this handsomely lettered sign on a long blocked-up letter box is, though the geo info on my (not big, not black) phone says it's somewhere near Regents Park.