Analysis of electoral registration data

Summary of what we analyse

Our analysis looks at key data relating to entries on the electoral registers, such as the number of entries, attainers, additions and deletions. It also looks at the results of the annual canvass activities that electoral registration officers at local councils carry out each year.


Between December 2017 and December 2018:

  • the total number of UK parliamentary electors decreased by 372,277 to 45,775,758 (a fall of 0.8%), this is compared to an increase in both 2016 and 2017
  • the total number of UK local government electors decreased by 146,991 to 47,785,498 (a fall of 0.3%)
  • the number of parliamentary and local government electors decreased in England, Scotland and Wales, but increased in Northern Ireland
  • the number of British Citizens living overseas registered to vote fell by 81% from 225,472 to 124,190
  • although only a small proportion of the total electorate, the number of anonymous electors in England and Wales rose again this year to 2658. This figure has more than doubled since 2010 when it was 1308.


There are 381 electoral registers in the United Kingdom. Electoral Registration Officers (EROs) are required to maintain two electoral registers and statistics are available for these two main groups of electors:

  • Parliamentary register – used for Westminster Parliamentary elections
  • Local government register – used for Scottish Parliamentary, National Assembly for Wales, Northern Ireland Assembly, local government, European Parliamentary, and Police and Crime Commissioner elections

Details of our analysis

Related statistics and data

Visit ONS for related statistics and data.

Last updated: 15 September 2020
Next review: 24 June 2020