Âé¶¹ÒùÔº


Research suggests new voter ID laws could 'significantly reduce' turnout

voting
Credit: Pixabay/CC0 Public Domain

A new law which requires voters to show ID at polling stations in the U.K. may "significantly reduce" turnout, according to a published in Political Science Research and Methods authored by Dr. Tom Barton, a postdoctoral researcher with the Department of Political Economy at King's.

A study focused on a local election in Bromley, London, which piloted voter ID in 2018, estimates that turnout was reduced by between 4% and 5%, with as many as 10,000 people eligible to vote put off from doing so.

The results of the study will be of interest to policymakers as, since October 2023, a new law means all elections in the U.K. now require to show ID.

Dr. Barton's research focused on an election held in the London Borough of Bromley in 2018, which was among a handful of local authorities in the U.K. that volunteered to pilot voter ID requirements and the only council in London.

Under the requirements, voters needed to show one piece of photo ID or two pieces of non-photo ID in order to receive their ballot paper. Under normal conditions, voters were only required to provide their name and address.

Dr. Barton's study focused on ward-level voting data from 2002 to 2018, comparing the average voter turnout over time in Bromley with turnout data from wards across London in the same period.

Dr. Barton said, "I found that the pilot scheme did significantly reduce turnout in Bromley, compared to a synthetic counterfactual. The effect estimated implies that of the 240,249 people registered to vote in 2018 in Bromley, 10,571 did not vote who would have otherwise done.

"The number of people turned away and not then returning estimated by the Electoral Commission in Bromley was 154. This large difference between the two figures implies that voter ID laws reduce turnout by deterring people who lack ID rather than catching them unaware."

More information: Tom Barton, Understanding the impact of the 2018 voter ID pilots on turnout at the London local elections: A synthetic difference-in-difference approach, Political Science Research and Methods (2025).

Provided by King's College London

Citation: Research suggests new voter ID laws could 'significantly reduce' turnout (2025, April 14) retrieved 3 August 2025 from /news/2025-04-voter-id-laws-significantly-turnout.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Model suggests voter turnout alone can predict election victory margins

0 shares

Feedback to editors