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UK Parliamentary Constituency and Ward Maps

UK constituency and ward boundary changes

Compare old and new constituency boundaries to see which areas moved, which seats changed their name, and where former constituencies were split. Search for a comparison map, or check council ward and division reviews below.

Darlington ward changes planned for May 2027

20 wards become 19, with 41 councillors instead of 50. The final recommendations were published on 29 September 2026. The planned first election is 6 May 2027, subject to Parliament’s approval.

Bank Top & Lascelles keeps its boundary. All other Darlington wards change. Compare the current wards with the recommended 2027 map.

Compare current and 2027 ward mapsOfficial review and data

650

Former constituencies

585

With boundary changes

51

Council review records

What changed at the 2024 general election?

The 2023 Boundary Review produced the constituency map used at the 2024 UK general election. Of the 650 former constituencies, 585 had a boundary change. The other 65 kept their boundary, although four received a new name. Some seats gained or lost areas. Others were split between several new constituencies. The House of Commons Library analysis explains these changes.

Use the search below to find your area. You can also read examples of the changes and check council ward reviews.

Read the full report: How constituency boundaries changed between elections.

2024 constituency comparisons

Each page compares a former constituency with its closest successor. It also lists every new constituency that received part of the old area.

650 comparisons.

Aberavon

Closest successor: Aberafan Maesteg

Wales · Boundary changed

Aberconwy

Closest successor: Bangor Aberconwy

Wales · Boundary changed

Aberdeen North

Closest successor: Aberdeen North

Scotland · Boundary changed

Aberdeen South

Closest successor: Aberdeen South

Scotland · Boundary changed

Aldershot

Closest successor: Aldershot

England · Boundary changed

Amber Valley

Closest successor: Amber Valley

England · Boundary changed

Angus

Closest successor: Angus and Perthshire Glens

Scotland · Boundary changed

Arfon

Closest successor: Dwyfor Meirionnydd

Wales · Boundary changed

Argyll and Bute

Closest successor: Argyll, Bute and South Lochaber

Scotland · Boundary changed

Ashfield

Closest successor: Ashfield

England · Boundary changed

Ashford

Closest successor: Ashford

England · Boundary changed

Aylesbury

Closest successor: Aylesbury

England · Boundary changed

Banbury

Closest successor: Banbury

England · Boundary changed

Banff and Buchan

Closest successor: Aberdeenshire North and Moray East

Scotland · Boundary changed

Barking

Closest successor: Barking

England · Boundary changed

Barnsley East

Closest successor: Barnsley South

England · Boundary changed

Basingstoke

Closest successor: Basingstoke

England · Boundary changed

Bassetlaw

Closest successor: Bassetlaw

England · Boundary changed

Bath

Closest successor: Bath

England · Boundary changed

Battersea

Closest successor: Battersea

England · Boundary changed

Beaconsfield

Closest successor: Beaconsfield

England · Boundary changed

Beckenham

Closest successor: Beckenham and Penge

England · Boundary changed

Bedford

Closest successor: Bedford

England · Boundary changed

Belfast East

Closest successor: Belfast East

Northern Ireland · Boundary changed

Belfast North

Closest successor: Belfast North

Northern Ireland · Boundary changed

Belfast South

Closest successor: Belfast South and Mid Down

Northern Ireland · Boundary changed

Belfast West

Closest successor: Belfast West

Northern Ireland · Boundary changed

Birkenhead

Closest successor: Birkenhead

England · Boundary changed

Bishop Auckland

Closest successor: Bishop Auckland

England · Boundary changed

Blackburn

Closest successor: Blackburn

England · Boundary changed

Blackpool South

Closest successor: Blackpool South

England · Boundary changed

Blaenau Gwent

Closest successor: Blaenau Gwent and Rhymney

Wales · Boundary changed

Blaydon

Closest successor: Blaydon and Consett

England · Boundary changed

Blyth Valley

Closest successor: Cramlington and Killingworth

England · Boundary changed

Bolsover

Closest successor: Bolsover

England · Boundary changed

Bolton South East

Closest successor: Bolton South and Walkden

England · Boundary changed

Bolton West

Closest successor: Bolton West

England · Boundary changed

Bootle

Closest successor: Bootle

England · Boundary retained

Bosworth

Closest successor: Hinckley and Bosworth

England · Boundary changed

Bracknell

Closest successor: Bracknell

England · Boundary changed

Bradford East

Closest successor: Bradford East

England · Boundary changed

Bradford South

Closest successor: Bradford South

England · Boundary changed

Bradford West

Closest successor: Bradford West

England · Boundary retained

Braintree

Closest successor: Braintree

England · Boundary changed

Brent Central

Closest successor: Brent East

England · Boundary changed

Brent North

Closest successor: Brent West

England · Boundary changed

Bridgend

Closest successor: Bridgend

Wales · Boundary changed

Brigg and Goole

Closest successor: Goole and Pocklington

England · Boundary changed

Brighton, Kemptown

Closest successor: Brighton Kemptown and Peacehaven

England · Boundary changed

Bristol East

Closest successor: Bristol East

England · Boundary changed

Bristol South

Closest successor: Bristol South

England · Boundary changed

Bristol West

Closest successor: Bristol Central

England · Boundary changed

Broadland

Closest successor: Broadland and Fakenham

England · Boundary changed

Bromsgrove

Closest successor: Bromsgrove

England · Boundary retained

Broxbourne

Closest successor: Broxbourne

England · Boundary changed

Broxtowe

Closest successor: Broxtowe

England · Boundary changed

Buckingham

Closest successor: Buckingham and Bletchley

England · Boundary changed

Burnley

Closest successor: Burnley

England · Boundary changed

Burton

Closest successor: Burton and Uttoxeter

England · Name changed

Why did constituency boundaries change?

The review aimed to make the number of registered voters in each constituency more equal. The total stayed at 650 seats, but their distribution changed. England received 543 seats, Scotland 57, Wales 32 and Northern Ireland 18. Five protected island constituencies had separate rules.

Independent Boundary Commissions reviewed each part of the UK. They considered local ties as well as voter numbers. In England, the process included initial proposals, public consultation, public hearings and revised proposals before the final recommendations in 2023. See the Boundary Commission for England's review and reports.

Examples of constituency boundary changes

A name alone does not show how much a boundary changed. These examples show a split, a smaller constituency and a change of name with no boundary change.

Holborn and St Pancras: a smaller area

The name stayed the same, but part of the area moved to Hampstead and Highgate. Holborn and St Pancras kept 87.8% of its former residential premises; 12.2% moved to the neighbouring seat.

How to read the old and new boundary maps

Open a comparison to view the old boundary and its closest successor. Check all linked constituencies to see where the rest of the former seat went. The percentages measure residential premises, not votes or land area. The ward lists use 2023 ward boundaries. These figures come from the House of Commons Library data.

Council ward and division reviews

Constituencies elect MPs. Wards and electoral divisions elect local councillors. Their boundaries follow separate reviews and can change at different times. A constituency boundary change does not mean that a ward boundary changed on the same date.

In England, an electoral review can change ward boundaries and the number of councillors. It aims to balance the number of voters each councillor represents and reflect local communities. Read how the Local Government Boundary Commission for England reviews wards.

Check the status and first election date in each record below. A final recommendation is not yet an implemented boundary. Open the official review for its reports and map files, including any change to the planned date.

Breckland

Deferred final recommendations

First election: Deferred; existing boundaries will be used in May 2027

27 to 35 wards.

LGBCE confirms these final recommendations will not be used in May 2027. No new first election date is confirmed. No final mapping ZIP was identified in the final report section. Earlier draft files must not be used as final data.

Official review and maps

Bristol

Draft

First election: Not confirmed

34 to 36 wards.

Draft boundaries may change. Do not label these as current or final boundaries. Draft proposals only. No first election date was confirmed on the review page.

Official review and maps · Download review map data

Cumberland

Final Recommendations

First election: May 2027 (planned)

46 to 55 wards.

Final recommendations are not yet law. The first election date is planned. A draft order was laid on 17 July 2026. The review page has not confirmed a made order.

Official review and maps · Download review map data

Dacorum

Deferred final recommendations

First election: Deferred; existing boundaries will be used in May 2027

25 to 26 wards.

LGBCE confirms these final recommendations will not be used in May 2027. No new first election date is confirmed. No final mapping ZIP was identified in the final report section. Earlier draft files must not be used as final data.

Official review and maps

Dorset

Draft

First election: Not confirmed

52 to 58 wards.

Draft boundaries may change. Do not label these as current or final boundaries. Draft proposals only. No first election date was confirmed on the review page.

Official review and maps · Download review map data

North West Leicestershire

Deferred final recommendations

First election: Deferred; existing boundaries will be used in May 2027

38 to 39 wards.

LGBCE confirms these final recommendations will not be used in May 2027. No new first election date is confirmed.

Official review and maps · Download review map data

Thanet

Deferred final recommendations

First election: Deferred; existing boundaries will be used in May 2027

LGBCE confirms these final recommendations will not be used in May 2027. No new first election date is confirmed. The report summary gives 21 proposed wards but its final summary table gives 20. Counts are withheld until this is resolved. No final mapping ZIP was identified in the final report section. Earlier draft files must not be used as final data.

Official review and maps

Thurrock

Implemented

First election: May 2026

20 to 20 wards.

The council confirms the new wards applied at the election on 7 May 2026; this supersedes the older postponement notice on the LGBCE page.

Official review and maps · Download review map data

Warrington

Draft

First election: 2028 (planned; exact date to be confirmed)

22 to 24 wards.

Draft boundaries may change. Do not label these as current or final boundaries. The review timeline gives 6 May 2028. This is a Saturday. The year is stored; the precise date is withheld pending confirmation.

Official review and maps · Download review map data

Buy a map of the changes

Choose a constituency above to buy a boundary comparison map. Pay on the comparison page. We prepare the vector files and send them by email after purchase. Printed maps are also available.

Choose a constituency

Browse current constituency maps · Browse ward maps

Constituency figures: House of Commons Library. Map outlines: ONS December 2022 and July 2024. Council review status checked on 1 October 2026.