Constituency changes, local election results and the stories behind the map.
90% of former constituencies changed boundary. A familiar name can hide a very different seat.
Newcastle upon Tyne North kept its name but less than half its former premises. Wales lost eight seats. We checked all 650 former constituencies to explain what changed between 2019 and 2024, with maps you can explore.
One-vote contests and wide vote spreads. Our first report examines 6,839 historical election records, with tables and source data.
Read the ward report
Holborn and St Pancras retained 87.8% of its former residential premises. See what changed and why names can mislead.
Read the case study
The Barnsley example explains how to read old-to-new boundary figures before using them in a story.
Understand the figuresCompare council areas, understand the election system and open the local data. Each guide links to the council pages and their sources.
Compare the 32 boroughs and the City of London. Check ward maps, seat snapshots and council tax figures.
Explore 32 council areas and understand why first-preference votes do not tell the full STV result.
Find the 22 principal council areas, their election records and local statistics.
Read DEA turnout alongside council maps. Learn why statistical wards are a different geography.
Distinguish counties, districts and unitary councils before you compare seats or population.
Check dates, licences and coverage. Learn how the pages handle missing results and boundary changes.
Compare the old and new constituency maps, or download the figures behind our latest report.
