It shows you hos prosperous these town centres once were. This was before underground radial railway lines were built into the centre of London, which subsequently destroyed these local economies. (Other aspects of increasing mobility played into it, too, of course, e.g. the rise in private motorised transportation, but that came later.)
A lovely picture series here:
http://www.hackneygazette.co.uk/news/heritage/historian_mocks_up_incredible_images_of_old_stoke_newington_1_4738741
It shows you hos prosperous these town centres once were. This was before underground radial railway lines were built into the centre of London, which subsequently destroyed these local economies. (Other aspects of increasing mobility played into it, too, of course, e.g. the rise in private motorised transportation, but that came later.)