Grey shades of an equalized scale of turnout on 650 parliamentary constituencies on the equal electorate cartogram (Appendix C) — software by author on an Archimedes computer.
The pattern shown is not all that easy to explain.The major cities and most of Northern Ireland have low numbers turnout, but so do the (elderly) South coast and (remote) Scottish highlands. High turnout can be seen in some of the Welsh valleys as well as around the prosperous suburban and market town rings. Many different explanations are required. Later (Plates CLXXVI and CLXXVII) we see how marginal seats have a higher turnout than those which are safer.