1987 census of employment by 633 parliamentary constituencies - software by author on an Archimedes computer.
Areas with a high proportions of full-time male workers in industry are seen to tend to support the Labour party. The lack of Liberal strongholds in areas with particularly skewed industrial structures is also apparent. The pattern of the light blue Conservative marginals, scattered about the country is also interesting. It is obvious, however, that voting composition cannot be completely explained by industrial structure, although interesting patterns can be found.