1955-1987 Votes for the Southern half of the 705 consistent parliamentary constituencies (Appendix C) - software by author on an Archimedes computer.
In the South of the country we see the most dramatic changes in people’s voting patterns. From a fairly mixed first image in the 1950s a divided nation had developed by 1987. The darkening ring of green (Liberal and Conservative) constituencies around the capital is clear, as is the geography of its evolution. The boundaries of the major conurbations are shown by faint lines.