Now, two and two may be making five, but " during the war" the house I lived in had the letters "FP" stencilled on the brickwork to the left of the front door which I always understood meant fire pump. So maybe my grand dad, whose home it was, was a member of such a fire crew and the FP indicated the location of a team pump. I do remember the pump and it wasn't a very impressive device. A brass stirrup pump that after the war I remember was used to water the garden.