9,289 1981 English and Welsh census wards on an equal population cartogram - software by author on an Archimedes computer.
An ordinary land map of inter-ward migration shows a complete tangle of lines. On the cartogram a very much more informative picture can be seen. The bundles of flows take the shape of London boroughs and other areas which Council house tenants found difficult to move out of. The more prosperous areas of the country are blackened by the density of flows in and through them. The shape of the conurbations is clear, as people who can avoid living there, migrate around them.