Once more, James makes important points.
In Britain, domestic electricity only spread quite slowly, even in towns. I remember my father telling me that his parents' house, in what was then a pleasant part of Liverpool, didn't have electricity until the 1950s. There was also a scheme during the bitter winter of 1947, when it became extremely difficult to move coal to power stations, to provide power to coastal towns by using submarines. Non-nuclear submarines, of course, use their diesel engines to charge the batteries used when submerged. It was calculated that connecting up two submarines to the local electricity supply would provide enough power for a town of 20,000.
Ann