Staffordshire South: New Boundaries 2018 Calculation

Staffordshire South: Overview

 Projection: CON seat 

Implied MP at 2017: Gavin Williamson  (CON)
County/Area: Staffordshire (West Midlands)
Electorate: 72,132
Turnout: 70.9%

 Implied 2017 VotesImplied 2017 Share
CON35,65869.8%
LAB12,92425.3%
LIB1,3492.6%
Green1,1812.3%
CON Majority22,73444.5%

See overview of other seats in West Midlands.

Staffordshire South : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Staffordshire South constituency, the 'West 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.

IndicatorSeatWest MidlandsAll GB
Party WinnerCONCONCON
Economic Position14° Right2° Right
National Position17° Nat9° Nat1° Int
EU Leave %65%59%52%
British Identity34%28%29%
Good Health54%45%48%
UK Born85%89%88%
Good Education54%35%39%
Good Job69%48%51%
High SEC69%46%51%
Average Age48.248.748.5
ABC1 Class72%49%53%

Staffordshire South ranks #59 for "Leave", #45 for "Right" and #19 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:

IndicatorCensus
Question
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

Staffordshire South: Map

Boundary Lines courtesy of Ordnance Survey OpenData © Crown copyright 2015

Introduction

This page shows the detail of the calculations performed to estimate the general election result for 2017 had the new boundaries for Staffordshire South 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 Staffordshire South

The old seat(s) needed are:

Old seat: Staffordshire South

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

Old seat: Staffordshire SouthTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
South StaffordshireBilbrook3,391Staffordshire South1,5785853101650002,359
South StaffordshireBrewood and Coven5,179Staffordshire South2,561891980540003,604
South StaffordshireCheslyn Hay North and Saredon3,353Staffordshire South1,14395412501120002,334
South StaffordshireCheslyn Hay South3,018Staffordshire South1,253741670390002,100
South StaffordshireCodsall North3,180Staffordshire South1,928225190410002,213
South StaffordshireCodsall South3,244Staffordshire South1,968202500370002,257
South StaffordshireEssington3,840Staffordshire South1,3921,0321750730002,672
South StaffordshireFeatherstone and Shareshill4,495Staffordshire South1,5051,30315301660003,127
South StaffordshireGreat Wyrley Landywood3,889Staffordshire South1,740911400150002,706
South StaffordshireGreat Wyrley Town4,808Staffordshire South2,0911,194310280003,344
South StaffordshireHimley and Swindon1,583Staffordshire South799182300910001,102
South StaffordshireHuntington and Hatherton4,021Staffordshire South1,5111,25550270002,798
South StaffordshireKinver5,671Staffordshire South3,352500220720003,946
South StaffordshirePattingham and Patshull1,762Staffordshire South1,103102110100001,226
South StaffordshirePerton Dippons1,594Staffordshire South779232700280001,109
South StaffordshirePerton East1,803Staffordshire South724422790300001,255
South StaffordshirePerton Lakeside5,014Staffordshire South2,2211,0161670850003,489
South StaffordshireTrysull and Seisdon1,743Staffordshire South1,1237250130001,213
South StaffordshireWombourne North and Lower Penn5,127Staffordshire South2,930512870390003,568
South StaffordshireWombourne South East3,023Staffordshire South1,853167570270002,104
South StaffordshireWombourne South West3,716Staffordshire South2,104426270290002,586
 Total73,454 35,65812,9241,34901,18100051,112

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

New seat: Staffordshire South

The new seat of Staffordshire South is made up of the following wards, with the transfer-adjusted votes shown.

New seat: Staffordshire South
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
South StaffordshireBilbrook3,160Staffordshire South1,5785853101650002,359
South StaffordshireBrewood and Coven5,374Staffordshire South2,561891980540003,604
South StaffordshireCheslyn Hay North and Saredon3,327Staffordshire South1,14395412501120002,334
South StaffordshireCheslyn Hay South2,908Staffordshire South1,253741670390002,100
South StaffordshireCodsall North3,265Staffordshire South1,928225190410002,213
South StaffordshireCodsall South3,135Staffordshire South1,968202500370002,257
South StaffordshireEssington4,020Staffordshire South1,3921,0321750730002,672
South StaffordshireFeatherstone and Shareshill3,663Staffordshire South1,5051,30315301660003,127
South StaffordshireGreat Wyrley Landywood3,639Staffordshire South1,740911400150002,706
South StaffordshireGreat Wyrley Town4,936Staffordshire South2,0911,194310280003,344
South StaffordshireHimley and Swindon1,788Staffordshire South799182300910001,102
South StaffordshireHuntington and Hatherton3,835Staffordshire South1,5111,25550270002,798
South StaffordshireKinver5,912Staffordshire South3,352500220720003,946
South StaffordshirePattingham and Patshull1,805Staffordshire South1,103102110100001,226
South StaffordshirePerton Dippons1,530Staffordshire South779232700280001,109
South StaffordshirePerton East1,689Staffordshire South724422790300001,255
South StaffordshirePerton Lakeside4,657Staffordshire South2,2211,0161670850003,489
South StaffordshireTrysull and Seisdon1,759Staffordshire South1,1237250130001,213
South StaffordshireWombourne North and Lower Penn5,203Staffordshire South2,930512870390003,568
South StaffordshireWombourne South East3,119Staffordshire South1,853167570270002,104
South StaffordshireWombourne South West3,408Staffordshire South2,104426270290002,586
 Total72,132 35,65812,9241,34901,18100051,112

And these are the implied results for 2017 for the new seat of Staffordshire South.


© 2017 Martin Baxter
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