UK Constituency Dashboards

Hertsmere

Sir Oliver Dowden is the Conservative MP for Hertsmere, and has been an MP since 7th May 2015.

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Sir Oliver Dowden thumbnail

Economy§

See the notes for more information about ratings. Click on a panel title to see a map of that metric for all constituencies.

ATMs: total

TotalPay-to-useFree-to-useFree-to-use: 40Pay-to-use: 19Total: 59
Relative ratings:
  • Free-to-use: ★★
  • Total: ★★★
As of June 2025. Source data: LINK ATMs by Parliamentary Constituency (Link)

Broadband: average download speeds

168.4 Mb/s

Speeds actually being received based on the mean average

Relative rating: ★★★★

As of May 2023. Source data: Broadband coverage and speeds (House of Commons Library)

Broadband: below universal service obligation

0%

Relative rating: ★★★★★

As of September 2023. Source data: Broadband coverage and speeds (House of Commons Library)

Broadband: gigabit availability

81.7%

Premises capable of receiving speeds of 1 gigabit per second

Relative rating: ★★★

As of September 2023. Source data: Broadband coverage and speeds (House of Commons Library)

Broadband: receiving over 30 Mbps

88%

Relative rating: ★★★★

As of May 2023. Source data: Broadband coverage and speeds (House of Commons Library)

Broadband: receiving under 10 Mbps

2.8%

Relative rating: ★★★★

As of May 2023. Source data: Broadband coverage and speeds (House of Commons Library)

Broadband: superfast availability - at least 30 Mbps

97.9%

Lines capable of receiving download speeds of at least 30 Mbps

Relative rating: ★★★

As of September 2023. Source data: Broadband coverage and speeds (House of Commons Library)

High-value homes sold

Price paid over £1.5 million

2020202220240100502018: 482019: 322020: 52021: 862022: 802023: 542024: 632025 (31st July): 16
As of 31st July 2025. Source data: Price Paid Data (HM Land Registry, OGL3)

House prices

200020102020£0£200,000£400,000£600,000Dec 1995: £83,500Dec 1996: £87,500Dec 1997: £97,950Dec 1998: £113,500Dec 1999: £128,250Dec 2000: £139,950Dec 2001: £159,950Dec 2002: £190,000Dec 2003: £215,000Dec 2004: £230,000Dec 2005: £240,000Dec 2006: £250,000Dec 2007: £275,000Dec 2008: £270,000Dec 2009: £255,000Dec 2010: £301,500Dec 2011: £295,000Dec 2012: £305,000Dec 2013: £312,890Dec 2014: £375,250Dec 2015: £406,500Dec 2016: £460,000Dec 2017: £461,250Dec 2018: £463,000Dec 2019: £455,500Dec 2020: £510,000Dec 2021: £550,000Dec 2022: £580,000Dec 2023: £565,000Sep 2024: £535,000
As of September 2024. Source data: House prices (ONS Housing Analysis Team)

Total income: median

£34,800

Relative rating: ★★★★★

As of 12th March 2025. Source data: Table 3.15a Income and tax by Parliamentary constituency, confidence intervals © HMRC

Total tax amount

£783,000,000

Relative rating: ★★★★★

As of 12th March 2025. Source data: Table 3.15a Income and tax by Parliamentary constituency, confidence intervals © HMRC

Unemployment

201620182020202220240%2%4%6%Mar 2014: 1.8%Jun 2014: 1.5%Sep 2014: 1.5%Dec 2014: 1.3%Mar 2015: 1.3%Jun 2015: 1.2%Sep 2015: 1.3%Dec 2015: 1.2%Mar 2016: 1.3%Jun 2016: 1.2%Sep 2016: 1.2%Dec 2016: 1.2%Mar 2017: 1.2%Jun 2017: 1.2%Sep 2017: 1.2%Dec 2017: 1.2%Mar 2018: 1.3%Jun 2018: 1.3%Sep 2018: 1.3%Dec 2018: 1.3%Mar 2019: 1.6%Jun 2019: 1.8%Sep 2019: 1.9%Dec 2019: 2%Mar 2020: 2.1%Jun 2020: 5.5%Sep 2020: 5.7%Dec 2020: 5.6%Mar 2021: 5.5%Jun 2021: 4.5%Sep 2021: 3.8%Dec 2021: 3.4%Mar 2022: 3.1%Jun 2022: 2.8%Sep 2022: 2.8%Dec 2022: 2.8%Mar 2023: 2.7%Jun 2023: 2.8%Sep 2023: 2.8%Dec 2023: 3%Mar 2024: 3.1%Jun 2024: 3.2%Sep 2024: 3.6%Dec 2024: 3.3%Mar 2025: 3.6%
As of March 2025. Source data: Claimant count by sex and age (NOMIS)

Energy§

See the notes for more information about ratings. Click on a panel title to see a map of that metric for all constituencies.

Central heating

No central heatingOtherTwo or more typesTank or bottled gas onlyOil onlyElectric onlyMains gas onlyMains gas only: 79.8%Electric only: 8.5%Oil only: 0.6%Tank or bottled gas only: 0.7%Two or more types: 7.7%Other: 1.7%No central heating: 1%
As of 2023. Source data: Central heating (House of Commons Library)

Domestic solar: capacity

4.4 MW

Relative rating: ★★

As of December 2024. Source data: Solar photovoltaics deployment (Department for Energy Security and Net Zero )

Domestic solar: installations

1,121

Relative rating:

As of December 2024. Source data: Solar photovoltaics deployment (Department for Energy Security and Net Zero )

Fuel poverty

8.1%

Relative rating: ★★★★★

As of 2023. Source data: Sub-regional fuel poverty data 2025 (2023 data) Table 4 (Department for Energy Security and Net Zero)

Households off the gas grid

20162018202020220%10%2015: 7.5%2016: 7.3%2017: 7.4%2018: 7.7%2019: 8.4%2020: 8.8%2021: 9.3%2022: 9.7%2023: 10%
As of 2023. Source data: Households off the gas grid (Department for Energy Security and Net Zero)

Environment§

See the notes for more information about ratings. Click on a panel title to see a map of that metric for all constituencies.

Access to green space

Partial-combinedCombinedNeighbourhood standardLocal standardDoorstep standardAll green space with rights of wayAll green spaceAll green space: 93.9%All green space with rights of way: 96.1%Doorstep standard: 23.7%Local standard: 23%Neighbourhood standard: 39%Combined: 6.5%Partial-combined: 28%
Relative ratings:
  • All green space: ★★★★
  • All green space with rights of way: ★★★
  • Doorstep standard: ★★★★★
  • Local standard: ★★★★★
  • Neighbourhood standard: ★★★★
  • Combined: ★★★★
  • Partial-combined: ★★★★★
As of 13th May 2025. Source data: Access to green space in England, (DEFRA)

Ancient woodland

3.2%

Relative rating: ★★★★

As of May 2024. Source data: Ancient woodland, Natural England and contains Ordnance Survey data © Crown copyright and database right 2024 (OGLv3)

Climate change: hottest day projections

0.9°C

Change for 2021-2040 compared to 1981-2010

As of 2025. Source data: Climate change projections (UCL/Copernicus/EuroCORDEX)

Climate change: rainfall (summer) projections

-2.7%

Change for 2021-2040 compared to 1981-2010

As of 2025. Source data: Climate change projections (UCL/Copernicus/EuroCORDEX)

Climate change: rainfall (winter) projections

9.5%

Change for 2021-2040 compared to 1981-2010

As of 2025. Source data: Climate change projections (UCL/Copernicus/EuroCORDEX)

Climate change: temperature projections

0.76°C

Change for 2021-2040 compared to 1981-2010

As of 2025. Source data: Climate change projections (UCL/Copernicus/EuroCORDEX)

Climate change: wettest 5 days projections

1.9%

Change for 2021-2040 compared to 1981-2010

As of 2025. Source data: Climate change projections (UCL/Copernicus/EuroCORDEX)

Countryside and Rights of Way

0.2%

Relative rating: ★★★★

As of May 2024. Source data: CRoW Act 2000 - Section 15 Land, Natural England/Defra (OGLv3)

Green belt: percentage

82.2%

Relative rating: ★★★★★

As of 31st March 2023. Source data: Green belt data (House of Commons Library/DLUHC)

Green belt: total

9,850 hectares

Relative rating: ★★★★★

As of 31st March 2023. Source data: Green belt data (House of Commons Library/DLUHC)

Storm overflows: duration

Total duration 2022

0 hr

Relative rating: ★★★★★

As of 27th March 2025. Source data: Event Duration Monitoring - Storm Overflows - Annual Returns (Environment Agency)

Storm overflows: duration

Total duration 2023

1.5 hr

Relative rating: ★★★★★

As of 27th March 2025. Source data: Event Duration Monitoring - Storm Overflows - Annual Returns (Environment Agency)

Storm overflows: duration

Total duration 2024

43 hr

Relative rating: ★★★★★

As of 27th March 2025. Source data: Event Duration Monitoring - Storm Overflows - Annual Returns (Environment Agency)

Storm overflows: spills

Total spills 2022

0

Relative rating: ★★★★★

As of 27th March 2025. Source data: Event Duration Monitoring - Storm Overflows - Annual Returns (Environment Agency)

Storm overflows: spills

Total spills 2023

3

Relative rating: ★★★★★

As of 27th March 2025. Source data: Event Duration Monitoring - Storm Overflows - Annual Returns (Environment Agency)

Storm overflows: spills

Total spills 2024

18

Relative rating: ★★★★★

As of 27th March 2025. Source data: Event Duration Monitoring - Storm Overflows - Annual Returns (Environment Agency)

Tree canopy cover

Proportion of constituency

19%
As of 2nd March 2023. Source data: Environmental, economic and health data, (Friends of the Earth)

Tree canopy cover

Neighbourhoods with less than 10% tree canopy

13%
As of 2nd March 2023. Source data: Environmental, economic and health data, (Friends of the Earth)

Health§

See the notes for more information about ratings. Click on a panel title to see a map of that metric for all constituencies.

Dentists

Private dentistsNHS/HSC/PHS dentistsAll dentistsAll dentists: 26NHS/HSC/PHS dentists: 20Private dentists: 6
Relative ratings:
  • All dentists: ★★★★★
  • NHS/HSC/PHS dentists: ★★★★★
  • Private dentists: ★★★★★
As of 6th May 2025. Source data: General Dental Practices (NHS England), Dental Practices and Patient Registrations (PHS Dental Care Team), Dentist and Surgery List (Business Services Organisation)

GP practices/branches

14
As of 1st July 2025. Source data: GP Practices and Branches (NHS England), GP Practice contact details and list sizes (PHS Dental Care Team), GP practice list sizes (Business Services Organisation)

Health-related social security

7.1%

Relative rating: ★★★★

As of 2025. Source data: Working-age population in receipt of health-related social security (JRF / DWP)

Life expectancy

83.2 years

Relative rating: ★★★★★

As of 2022. Source data: Life expectancy at birth 2022 (ONS)

Opticians

26

Relative rating: ★★★★★

As of 27th May 2025. Source data: Optical sites (NHS England)

Society§

See the notes for more information about ratings. Click on a panel title to see a map of that metric for all constituencies.

Child poverty

17.6%

Relative rating: ★★★★★

As of 2023. Source data: Child poverty rate estimates, after housing costs (Loughborough University/JRF 2022/23).

Child poverty: children affected by two-child limit

7%

Relative rating: ★★★★

As of 2023. Source data: Child poverty rate estimates, after housing costs (Loughborough University/JRF 2022/23).

Commemorative plaques

9
As of 29th May 2025. Source data: OpenPlaques (© Open Plaques, Public Domain).

Crime: all

201820202022010,00020,0002017: 10,5532018: 10,0972019: 10,0772020: 9,7962021: 9,8932022: 9,6272023: 9,9402024: 9,944
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: anti-social behaviour

20182020202202,0004,0002017: 3,0552018: 2,2282019: 2,0752020: 2,3962021: 2,4972022: 2,2142023: 2,3362024: 2,103
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: bicycle theft

2018202020220100502017: 752018: 922019: 962020: 672021: 812022: 612023: 852024: 55
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: burglary

20182020202201,0005002017: 7672018: 7062019: 6332020: 4362021: 4392022: 3982023: 473
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: criminal damage and arson

20182020202201,0005002017: 8882018: 7532019: 6872020: 6372021: 6122022: 6952023: 6332024: 619
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: drugs

20182020202201002003002017: 2552018: 2282019: 2522020: 2542021: 2352022: 2212023: 2612024: 237
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: other

20182020202201002002017: 1622018: 1202019: 1612020: 1422021: 1502022: 1292023: 1542024: 173
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: possession of weapons

20182020202201002003002017: 2822018: 1332019: 662020: 562021: 592022: 532023: 532024: 76
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: public order

20182020202201,0005002017: 6142018: 5902019: 5452020: 5542021: 5522022: 4772023: 4652024: 475
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: robbery

2018202020220100502017: 902018: 782019: 852020: 592021: 532022: 692023: 642024: 89
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: shoplifting

20182020202201,0005002017: 6182018: 6582019: 7422020: 8082021: 7112022: 5432023: 6722024: 842
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: theft from the person

20182020202201002002017: 922018: 1072019: 1212020: 792021: 642022: 702023: 832024: 94
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: vehicle

20182020202201,0002,0002017: 7052018: 1,0412019: 1,1702020: 9152021: 8732022: 9052023: 8662024: 839
As of 7th May 2025. Source data: crime data (data.police.uk).

Crime: violence and sexual offences

20182020202201,0002,0003,0002017: 1,9162018: 2,2452019: 2,3352020: 2,4632021: 2,5762022: 2,5872023: 2,5272024: 2,825
As of 7th May 2025. Source data: crime data (data.police.uk).

EU referendum

51.1%

Percentage that voted Leave

As of 2024. Source data: EU referendum estimates for 2024 boundaries

Fish and chip shops

6
As of 1st September 2025. Source data: OpenStreetMap (© OpenStreetMap contributors).

Foodbanks

3
As of 20th August 2025. Source data: Food banks (Give Food).

Gambling premises

Pool BettingFamily Entertainment CentreCasino 2005CasinoBingoBetting ShopAdult Gaming CentreTotalTotal: 19Adult Gaming Centre: 4Betting Shop: 13Bingo: 2Casino: 0Casino 2005: 0Family Entertainment Centre: 0Pool Betting: 0
Source data: the register of gambling premises (© Gambling Commission).

General Election (notional): 12 December 2019

Con
Source data: Notional General Election 2019 (Rallings & Thrasher, Professor David Denver (Scotland), Nicholas Whyte (NI) for Sky News, PA, BBC News and ITV News).

General Election: 4 July 2024

Con
Source data: 2024 election results (Open Innovations).

Heritage at Risk: all

0

Relative rating: ★★★★★

As of November 2024. Source data: Heritage at Risk Register 2024 (Historic England)

Heritage at Risk: archaeology

0

Relative rating: ★★★★★

As of November 2024. Source data: Heritage at Risk Register 2024 (Historic England)

Heritage at Risk: building or structure

0

Relative rating: ★★★★★

As of November 2024. Source data: Heritage at Risk Register 2024 (Historic England)

Heritage at Risk: conservation area

0

Relative rating: ★★★★★

As of November 2024. Source data: Heritage at Risk Register 2024 (Historic England)

Heritage at Risk: place of worship

0

Relative rating: ★★★★★

As of November 2024. Source data: Heritage at Risk Register 2024 (Historic England)

Higher education: entry rates for 18 year olds

2010201520200%20%40%60%2006: 36.2%2007: 33.4%2008: 40.4%2009: 41.4%2010: 39.8%2010: 39.8%2011: 44.2%2012: 43.9%2013: 41.1%2014: 46.4%2015: 43.4%2016: 51.6%2017: 48.8%2018: 50.9%2019: 51.4%2020: 53.8%2021: 55.6%2022: 53.2%2023: 54.3%2024: 52.7%
As of 2024. Source data: entry rates (UCAS).

Household composition

Other household typesOther single-family householdsFamilies with dependent childrenOne-personOne-person: 27%Families with dependent children: 32.7%Other single-family households: 35.8%Other household types: 4.5%
As of 14th October 2024. Source data: Household composition (© House of Commons Library/ONS/Northern Ireland Statistics and Research Agency/Scotland's census OGL).

Indicies of Multiple Deprivation: proportions

High deprivation LSOA (quintile 1)Medium deprivation LSOA (quintile 2,3)Low deprivation LSOA (quintile 4,5)Low deprivation LSOA (quintile 4,5): 60.4%Medium deprivation LSOA (quintile 2,3): 38.1%High deprivation LSOA (quintile 1): 1.5%
As of 3rd June 2025. Source data: composite 2020 UK index of multiple deprivation version: 3.3.0 (MySociety, CC-BY).

Indicies of Multiple Deprivation: score

13.586

Composite score from 0 (low deprivation) to 100 (high deprivation)

As of 24th October 2023. Source data: composite 2020 UK index of multiple deprivation version: 3.3.0 (MySociety, CC-BY).

MP: Left vs Right

Economy

67.281

From 0 (left) to 100 (right)

As of January 2025. Source data: MPs: Left vs Right (Royal Holloway / Survation / UK in a Changing Europe).

MP: Left vs Right

Culture

70.588

From 0 (left) to 100 (right)

As of January 2025. Source data: MPs: Left vs Right (Royal Holloway / Survation / UK in a Changing Europe).

MP: financial interests

VisitsDonationsGiftsEmploymentEmployment: £130,000Gifts: £10,011.8Donations: £0Visits: £21,571.41
As of 4th August 2025. Source data: Register of Interests (UK Parliament).

Memorial benches

25
As of 20th August 2025. Source data: OpenBenches (© Terence Eden and Elizabeth Eden CC-BY-SA).

Ofsted ratings: children's social care

InadequateRequires improvementGoodOutstandingOutstanding: 0%Good: 100%Requires improvement: 0%Inadequate: 0%
As of 19th July 2024. Source data: Inspection outcomes (Ofsted, OGL).

Ofsted ratings: early years

InadequateRequires improvementGoodOutstandingOutstanding: 15%Good: 80%Requires improvement: 3%Inadequate: 1%
As of 19th July 2024. Source data: Inspection outcomes (Ofsted, OGL).

Ofsted ratings: further education and skills

InadequateRequires improvementGoodOutstandingOutstanding: 0%Good: 100%Requires improvement: 0%Inadequate: 0%
As of 19th July 2024. Source data: Inspection outcomes (Ofsted, OGL).

Ofsted ratings: state-funded schools

InadequateRequires improvementGoodOutstandingOutstanding: 12%Good: 72%Requires improvement: 14%Inadequate: 2%
As of 19th July 2024. Source data: Inspection outcomes (Ofsted, OGL).

Population: by age

0102030405060708001,0002,0000: 1,1041: 1,2112: 1,2593: 1,2354: 1,2565: 1,2516: 1,3437: 1,3098: 1,3589: 1,34110: 1,38611: 1,39312: 1,39413: 1,40014: 1,45215: 1,32616: 1,36417: 1,32418: 1,27219: 74820: 73421: 93622: 1,06023: 1,22024: 1,25125: 1,18026: 1,10227: 1,26828: 1,17729: 1,12930: 1,13831: 1,26132: 1,30433: 1,21334: 1,31035: 1,32636: 1,45337: 1,51638: 1,52739: 1,43840: 1,52141: 1,59642: 1,50043: 1,57244: 1,50245: 1,45846: 1,47047: 1,43548: 1,46949: 1,41550: 1,47051: 1,50052: 1,42353: 1,43054: 1,51855: 1,40756: 1,56157: 1,54558: 1,49659: 1,44260: 1,31761: 1,33262: 1,22363: 1,22264: 1,10765: 1,04166: 1,02967: 1,10568: 98269: 91970: 93471: 89672: 92673: 98774: 96775: 1,13676: 88777: 77578: 83079: 73580: 57581: 51382: 55083: 55184: 55285: 44586: 42087: 39388: 32689: 30090+: 1,239
Source data: Population by constituency (House of Commons Library using ONS Population estimates for England and Wales, mid-2022, NRS Search census data 2022, Table UV103 (Age by single year), NISRA 2021 Mid-year population estimates for small geographical areas within Northern Ireland)

Post offices

13
As of 27th May 2025. Source data: All branches (© Post Office).

Pubs

34
As of 1st September 2025. Source data: OpenStreetMap (© OpenStreetMap contributors).

Pupil to teacher ratio (qualified) within schools

20152020010202010/11: 17.682011/12: 17.712012/13: 17.282013/14: 17.032014/15: 16.952015/16: 17.462016/17: 17.992017/18: 18.42018/19: 18.882019/20: 19.162020/21: 19.022021/22: 18.352022/23: 18.932023/24: 18.972024/25: 18.96
As of 9th June 2025. Source data: Pupil to teacher ratios (School workforce in England, OGL).

Sexuality

Not answered / prefer not to sayAll other sexual orientationsBisexualGay or LesbianStraight or HeterosexualStraight or Heterosexual: 90.6%Gay or Lesbian: 1%Bisexual: 0.8%All other sexual orientations: 0.3%Not answered / prefer not to say: 7.4%
Source data: Census 2021: Sexual orientation (ONS

Transport§

See the notes for more information about ratings. Click on a panel title to see a map of that metric for all constituencies.

Bus service changes

-33.4%

Change in trips per hour 2010-2023

Relative rating: ★★★

As of 28th November 2023. Source data: How Britain’s bus services have drastically declined (Friends of the Earth & University of Leeds 2023)

Bus stops

485

Relative rating: ★★

As of April 2025. Source data: NaPTAN national stop data

Bus stops density

4.05/km²

Relative rating: ★★★

As of April 2025. Source data: NaPTAN national stop data

Cars or vans by household

No cars or vans in household %

10.1%
Source data: Distance travelled to work by car or van availability (ONS)

Cars or vans by household

1 or more cars or vans in household %

89.9%
Source data: Distance travelled to work by car or van availability (ONS)

EV: home charging

1,369

Relative rating: ★★★★★

As of 2022. Source data: Electric Vehicle Charging Grant Scheme Statistics (DfT)

EV: workplace charging points

174

Relative rating: ★★★★★

As of January 2025. Source data: Electric Vehicle Charging Grant Scheme Statistics (DfT)

Rail cancellations

4.9%

Relative rating:

As of March 2025. Source data: Performance at stations (ORR)

Road accidents: fatal collisions

2005201020152020010202000: 72001: 42002: 132003: 52004: 52005: 72006: 32007: 112008: 12009: 02010: 42011: 52012: 42013: 42014: 52015: 02016: 52017: 12018: 22019: 22020: 22021: 42022: 52023: 6
As of 31st December 2023. Source data: Road Safety Data - Collisions (Department for Transport, OGL)

Road accidents: serious collisions

20052010201520200100502000: 872001: 842002: 842003: 582004: 612005: 472006: 462007: 472008: 482009: 492010: 352011: 322012: 422013: 432014: 302015: 382016: 462017: 502018: 372019: 282020: 312021: 352022: 402023: 44
As of 31st December 2023. Source data: Road Safety Data - Collisions (Department for Transport, OGL)

Road accidents: slight collisions

200520102015202002004006002000: 4182001: 3932002: 4012003: 3832004: 3922005: 3692006: 3622007: 3232008: 2822009: 2842010: 3022011: 2922012: 2582013: 2502014: 2892015: 2962016: 2982017: 2562018: 2312019: 1972020: 1482021: 1642022: 2142023: 172
As of 31st December 2023. Source data: Road Safety Data - Collisions (Department for Transport, OGL)

Train stations

4

Relative rating: ★★★

As of April 2025. Source data: NaPTAN national stop data

Train stations density

0.033/km²

Relative rating: ★★★

As of April 2025. Source data: NaPTAN national stop data

Notes

Rating

Ratings are based on ranking every constituency with data and using the following percentiles:

  • ★★★★★ 80-100%
  • ★★★★ 60-80%
  • ★★★ 40-60%
  • ★★ 20-40%
  • ★ 0-20%

There are some cases where more is not better. In those cases we have flipped the ranking so that a lower relative value would receive more stars. For example, a child poverty rate of 0% would be ★★★★★.

Updates

We try to update datasets when there is a new release. If you know of a more recent update to a dataset, please let us know.

Any dates given in the attribution are the date of the most recent data, which can lag the release date of the dataset.

Are there constituency-level datasets that you think we're missing? Let us know about new datasets.