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New Report: Individual Electoral Registration and the British Election Study

The British Election Study Team

In 2014 Individual Electoral Registration (IER) was introduced in England, Scotland and Wales. IER requires voters to register individually and provide individual identifying information, such as their date of birth and national insurance number. It replaced the previous system of ‘Household Electoral Registration’ (HER), whereby one person in every household was responsible for registering everyone else who lived at that address and no additional identifying information was required. Importantly, the new system allowed for voters to register online. 

In 2018 the BES team produced a report “Assessing the Impact of Individual Electoral Registration using the British Election Study” co-authored by Jessica Smith (University of Southampton) and in collaboration with the Electoral Commission. The report is now publicly available for the first time. The report draws on data from the British Election Study internet panel and face-to-face survey data in conjunction with electoral registration records to examine who was registered to vote during the transition period and how people feel about the registration process. Specifically, the questions asked in this report are:

  • How has the transition to IER affected overall registration levels in the population?
  • Has the transition to IER impacted registration levels amongst specific demographic groups?
  • Who has dropped off the electoral register during the transition to IER?
  • Who has joined the electoral register during the transition to IER?
  • How has satisfaction with the registration system changed over time?

In broad terms, the answers to these questions depend on when we are talking about. During the transition period (up to May 2016) we found clear evidence that overall levels of registration decreased and that people in demographic groups that are less likely to be registered in general (i.e. young people and privately renters) were more likely to drop off the register. Comparing the 2015 and 2017 elections however we find no evidence that IER affected the level of registration at the time of the elections, nor that is disproportionately affected groups that are less likely to be registered in general. How can we reconcile these seemingly contradictory findings? In short, IER seems to have increased the volatility of electoral registration – people were more likely to drop on and off the register when IER came into force. 

For example, Figure 1 shows the pattern of movement on and off the register by age. During the transition period, all age groups were significantly more likely to drop off the register than those 66 years old and above. After IER was finalised, only those 45 years old and below were significantly more likely to drop off the register, suggesting any negative short-term effects of the change were concentrated in the younger age groups. We also see a big increase in the total number of people who dropped off the register between the two periods. 

Figure 1 also shows differences in age groups in terms of who joins the register with the youngest age groups also being the most likely to join, especially in the transition period. However, in both absolute and relative terms younger people were more likely to drop–off than to join following the finalisation of the IER registers in December 2015. Overall we see greater volatility in registration in these age groups, with voters more likely to drop on and off the register. 


Age Group and Between Wave Changes: Panel Data 2014-16

We cannot say for sure whether the pattern we observe of people dropping off the register between elections but registering in-time for elections is a feature of the 2014-2017 period, or is something we are likely to continue to observe in the future. If this pattern persists it is both good and bad news for British democracy. On the one hand, it is good news that IER has not negatively impacted registration levels at the time of elections – electoral participation does not seem to have been affected. On the other hand however, electoral registers serve important roles between elections as well – such as being used to redraw constituency boundaries. If registers are incomplete then decisions that arise from them such as constituency boundaries will be badly informed.