Corby and Northamptonshire East: New Boundaries 2018 Calculation

Corby and Northamptonshire East: Overview

 Projection: CON seat 

Implied MP at 2017: Tom Pursglove  (CON)
County/Area: Northamptonshire (East Midlands)
Electorate: 76,049
Turnout: 72.8%

 Implied 2017 VotesImplied 2017 Share
CON Majority2,0723.7%

See overview of other seats in East Midlands.

Corby and Northamptonshire East : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Corby and Northamptonshire East constituency, the 'East Midlands' area and nation.

The political measures include the Left/Right and International/National axes (what does this mean).

The demographic measures are from the 2011 Census and include categories relating to national identity, economic activity, health and education. These categories are those which have the most relevance to political attitudes.

IndicatorSeatEast MidlandsAll GB
Economic Position4° Right
National Position9° Nat8° Nat
EU Leave %59%59%52%
British Identity26%27%29%
Good Health47%45%48%
UK Born90%91%88%
Good Education32%36%39%
Good Job43%48%51%
High SEC44%47%51%
Average Age48.749.148.5
ABC1 Class44%50%53%

Corby and Northamptonshire East ranks #148 for "Leave", #301 for "Right" and #150 for "National" out of 600 new seats.

Indicators: Legend and Descriptions

Indicators : Legend and Descriptions

The colour scheme used in the table above is explained in the legend table below. The eight census indicators (British Identity, Good Health, UK Born, Good Education, Good Job, High SEC, Average Age and AB1 Class) all use the same 'Census' colour scheme indicating whether the area's level is above or below the national average.

TopicCat 1Cat 2Cat 3Cat 4Cat 5
Economic PositionVery LeftLeftCentristRightVery Right
National PositionVery IntInternationalCentristNationalVery Nat
EU Leave %Very RemainRemainBalancedLeaveVery Leave
CensusVery LowLowMediumHighVery High

Indicator definitions are given in terms of political data definitions or census categories:

Definition / Included Census Categories
Party WinnerArea party winner : actual election result or projected by Electoral Calculus
Economic PositionEconomic position between 100° Left and 100° Right, estimated by Electoral Calculus from political and demographic data.
National PositionNational position between 100° International and 100° National, estimated by Electoral Calculus from political and demographic data.
EU Leave %EU Referendum vote share for 'Leave' : actual result or estimate
British IdentityNational Identity (KS202)Those answering British, British-Other, or Scottish-British
Good HealthHealth (KS301)Those answering 'Very Good Health'
UK BornCountry of Birth (QS203)Those answering England, Northern Ireland, Scotland, Wales, GB Other, or UK Other
Good EducationHighest level of Qualification (QS501)Level 3 (A-level equivalent) or Level 4+ (degree equivalent)
Good JobOccupation (QS606)Occupation codes 1xx to 4xx (Managers, Professionals, Associates, and office workers)
High SECNS-SeC of Household Reference Person (QS609)National Statistics Socio-economic Classification from 1 to 4 (higher managers and professionals, lower managers and professionals, intermediate occupations, small employers and self-employed).
Average AgeAge (QS103)Average age of adults (18 years and above)
ABC1 ClassApproximated Social Grade (QS611)Approximated social grades A, B and C1

Corby and Northamptonshire East: Map

Boundary Lines courtesy of Ordnance Survey OpenData © Crown copyright 2015


This page shows the detail of the calculations performed to estimate the general election result for 2017 had the new boundaries for Corby and Northamptonshire East been in force at that time. The basic idea of the calculation is to look at the district council wards which make up the new seat, and estimate how they voted in 2017. This estimate is based on the recent local election results in those wards, with adjustments made to allow for different turnouts and different voting patterns for local and general elections.

In many cases, wards are divided between several old constituencies or between new constituencies. So the same ward may be shown more than once, but the electorate shown will reflect that ward sub-section.

Election results from a recent local election are given. This is usually the local election closest to 2015 from the period 2012-2015. For multiple-member wards, the votes shown are the sum of the votes cast for all candidates of each party. A negative number indicates candidate(s) elected unopposed.

Calculation method

There are two problems with using the raw (actual) local election results to imply general election results ward-by-ward. Firstly, turnout can be different between local and general elections, which means that the total number of local votes cast does not equal the number of votes cast in each old seat at the general election. To correct for this, we adjust the local votes to match the general election turnout. Each ward's result is scaled, whilst keeping constant the percentage support for each party, so that the total turnout adds up to the old seat's general election turnout. All wards in the old seat are assumed to have the same percentage turnout.

Secondly, even though we now have the correct number of votes in the old seat, the party totals will not match the general election result. Some parties do better at the local election than the general election, and others do vice versa. We call these strong and weak parties respectively. The next step is to transfer votes from strong parties to weak parties. This is done by taking votes proportionally away from strong parties and putting them in a transfer pool. For instance if a party got 12,500 local votes, but only 10,000 general election votes, it will lose 20% over all the wards. These votes in each ward will be put in the ward's transfer pool and allocated to the weak parties. Weak parties will get votes transferred to them in proportion to the votes they need over the old seat. For instance, if two weak parties need 4,000 and 1,000 votes respectively, the first party will get 80% of each ward's transfer pool and the second party will get 20% of each ward's transfer pool. The transfer of votes between parties is done using the Electoral Calculus Transition Model.

More details of the calculation formulas are available.

List of old seats forming part of Corby and Northamptonshire East

The old seat(s) needed are:

Old seat: Corby

The table shows the transfer-adjusted results for each ward in the old seat of Corby, as well as showing which new seat each ward is in.

Old seat: CorbyTransfer-adjusted Results
New SeatCON
East NorthamptonshireBarnwell1,481Corby and Northamptonshire East773245441160001,079
East NorthamptonshireFineshade1,534Corby and Northamptonshire East806280121270001,117
East NorthamptonshireKing's Forest1,422Corby and Northamptonshire East709261471170001,035
East NorthamptonshireLower Nene1,606Corby and Northamptonshire East862253143090001,168
East NorthamptonshireLyveden1,522Corby and Northamptonshire East787287141370001,108
East NorthamptonshireOundle4,721Corby and Northamptonshire East2,1371,0887494430003,436
East NorthamptonshirePrebendal1,603Corby and Northamptonshire East831268491180001,167
East NorthamptonshireWoodford1,583Corby and Northamptonshire East7443671813100001,152
CorbyBeanfield5,424Corby and Northamptonshire East1,2242,45597139330003,948
CorbyCentral3,465Corby and Northamptonshire East7751,6166047240002,522
CorbyDanesholme3,092Corby and Northamptonshire East8701,12914187220002,249
CorbyKingswood and Hazel Leys5,104Corby and Northamptonshire East1,1272,31760130810003,715
CorbyLloyds5,294Corby and Northamptonshire East1,2312,4328968330003,853
CorbyLodge Park5,128Corby and Northamptonshire East1,2682,20791133330003,732
CorbyOakley North2,843Corby and Northamptonshire East9169798773150002,070
CorbyOakley South5,866Corby and Northamptonshire East2,2071,9235660240004,270
CorbyRowlett3,972Corby and Northamptonshire East9461,74473101260002,890
CorbyRural West1,274Corby and Northamptonshire East55831439115000927
CorbyStanion and Corby Village1,861Corby and Northamptonshire East6516182746110001,353
CorbyWeldon and Gretton2,550Corby and Northamptonshire East98765510960440001,855
East NorthamptonshireIrthlingborough John Pyel3,436Wellingborough and Rushden1,2821,0555881250002,501
East NorthamptonshireIrthlingborough Waterloo2,956Wellingborough and Rushden1,2318383333160002,151
East NorthamptonshireRaunds Saxon3,337Corby and Northamptonshire East1,4778594332180002,429
East NorthamptonshireRaunds Windmill3,129Corby and Northamptonshire East1,2448775578220002,276
East NorthamptonshireStanwick1,638Corby and Northamptonshire East815299571480001,193
East NorthamptonshireThrapston Lakes3,550Corby and Northamptonshire East1,6358454834220002,584
East NorthamptonshireThrapston Market3,050Corby and Northamptonshire East1,4446344973200002,220
 Total82,441 29,53726,8451,5441,49557900060,000

The full details of these calculations are given on the Corby seat details page. Click on "Show workings".

New seat: Corby and Northamptonshire East

The new seat of Corby and Northamptonshire East is made up of the following wards, with the transfer-adjusted votes shown.

New seat: Corby and Northamptonshire East
Old Seat CON
CorbyKingswood and Hazel Leys5,104Corby1,1272,31760130810003,715
CorbyLodge Park5,128Corby1,2682,20791133330003,732
CorbyOakley North2,843Corby9169798773150002,070
CorbyOakley South5,866Corby2,2071,9235660240004,270
CorbyRural West1,274Corby55831439115000927
CorbyStanion and Corby Village1,861Corby6516182746110001,353
CorbyWeldon and Gretton2,550Corby98765510960440001,855
East NorthamptonshireBarnwell1,481Corby773245441160001,079
East NorthamptonshireFineshade1,534Corby806280121270001,117
East NorthamptonshireKing's Forest1,422Corby709261471170001,035
East NorthamptonshireLower Nene1,606Corby862253143090001,168
East NorthamptonshireLyveden1,522Corby787287141370001,108
East NorthamptonshireOundle4,721Corby2,1371,0887494430003,436
East NorthamptonshirePrebendal1,603Corby831268491180001,167
East NorthamptonshireRaunds Saxon3,337Corby1,4778594332180002,429
East NorthamptonshireRaunds Windmill3,129Corby1,2448775578220002,276
East NorthamptonshireStanwick1,638Corby815299571480001,193
East NorthamptonshireThrapston Lakes3,550Corby1,6358454834220002,584
East NorthamptonshireThrapston Market3,050Corby1,4446344973200002,220
East NorthamptonshireWoodford1,583Corby7443671813100001,152
 Total76,049 27,02424,9521,4531,38153800055,348

And these are the implied results for 2017 for the new seat of Corby and Northamptonshire East. Please note that the wards used are those of 2015 in order to be consistent with those used by the Boundary Commissions.

© 2019 Electoral Calculus Ltd
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