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Guidance: Historical background information on nationality

The history of British nationality law falls into 4 periods, which are marked by key pieces of legislation:

  • before 1915
  • between 1915 and 1948
  • between 1949 and 1983
  • after 1983

This document can be used in conjunction with other nationality guidance to assess citizenship claims where the person’s age requires the different laws in place at the time of their birth be taken into account.