Three colours are used to represent the votes of the major parties in 705 consistent constituencies on the (changing) equal electorate cartograms (Appendices B and C) — software written by author on an Archimedes computer.
The general change and recent polarization is evident. A consolidation can also be seen in the Liberal vote in some places over the last few elections. The ring formed around the capital by 1987 mirrors a lot of the other distributions found in this dissertation. Britain was, apparently, spatially a much less divided country in the past.