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To stop any future misleading and unhelpful miscategorisation especially by Botmultichill, historic locator maps of London Parliamentary constituencies should be in the following categories only:

There is no need for further categorisation by years of establishment and disestablishment because this is misleading: a map of a constituency created in 1918, which altered boundaries in 1950, has no relevance to its subsequent abolition in 1974 or 1983.