Eltham and East Wickham: New Boundaries 2018 Calculation

Eltham and East Wickham: Overview

 Projection: LAB seat 

Implied MP at 2017: Clive Efford  (LAB)
County/Area: Greenwich (London)
Electorate: 81,071
Turnout: 71.8%

 Implied 2017 VotesImplied 2017 Share
LAB29,27250.3%
CON25,71744.2%
LIB1,8213.1%
OTH8421.4%
UKIP4500.8%
Green1350.2%
LAB Majority3,5556.1%

See overview of other seats in London.

Eltham and East Wickham : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Eltham and East Wickham constituency, the 'London' area and nation.

The political measures include the three axes: Economic (Left/Right), National (Global/National) and Social (Liberal/Conservative). (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.

IndicatorSeatLondonAll GB
Party WinnerLABLABCON
Economic Position1° Right2° Left
National Position3° Nat15° Glo
Social Position2° Con5° Lib
TribeCentrists
EU Leave %54%40%52%
British Identity29%38%29%
Good Health47%50%48%
UK Born81%64%88%
Good Education37%48%39%
Good Job55%61%51%
High SEC53%55%51%
Average Age47.344.148.5
ABC1 Class56%62%53%

Eltham and East Wickham ranks #276 for "Leave", #323 for "Right", #310 for "National" and #315 for "Social" 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 GlobalGlobalCentristNationalVery Nat
Social PositionVery LibLiberalModerateConservativeVery Cons
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° Global and 100° National, estimated by Electoral Calculus from political and demographic data.
Social PositionSocial position between 100° Liberal and 100° Conservative, estimated by Electoral Calculus from political and demographic data.
TribeTribe group dominant in the area. Can be: Strong Left, Traditionalists, Progressives, Centrists, Somewheres, Kind Young Capitalists, or Strong Right. See details.
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

Eltham and East Wickham: 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 Eltham and East Wickham 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 Eltham and East Wickham

The old seat(s) needed are:

Old seat: Eltham

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

Old seat: ElthamTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
GreenwichColdharbour and New Eltham9,489Eltham and East Wickham3,5772,91815200001466,793
GreenwichEltham North9,046Eltham and East Wickham3,0793,1132190000656,476
GreenwichEltham South9,049Eltham and East Wickham3,1542,92821600001806,478
GreenwichEltham West7,197Eltham and East Wickham1,6093,32511100001085,153
GreenwichKidbrooke with Hornfair10,332Eltham and East Wickham2,5074,6431840000637,397
GreenwichMiddle Park and Sutcliffe9,733Eltham and East Wickham2,6143,96826700001186,967
GreenwichShooters Hill9,629Eltham and East Wickham2,2924,2333080000606,893
 Total64,475 18,83225,1281,457000074046,157

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

Old seat: Old Bexley and Sidcup

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

Old seat: Old Bexley and SidcupTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
BexleyBlackfen and Lamorbey8,145Bexley and Sidcup3,6661,7051882437000575,929
BexleyBlendon and Penhill8,360Bexley and Sidcup3,9521,6651342126400586,085
BexleyCray Meadows8,582Bexley and Sidcup3,6592,0911572157200516,245
BexleyEast Wickham8,319Eltham and East Wickham3,3582,1731722316900546,057
BexleyFalconwood and Welling8,277Eltham and East Wickham3,5271,9711922196600486,023
BexleyLonglands7,973Bexley and Sidcup3,5741,6382911987400275,802
BexleySt Mary's8,022Bexley and Sidcup3,9281,28425410619700705,839
BexleySidcup8,324Bexley and Sidcup3,8811,55118419520600416,058
 Total66,002 29,54514,0781,5721,6198180040648,038

The full details of these calculations are given on the Old Bexley and Sidcup seat details page. Click on "Show workings".

New seat: Eltham and East Wickham

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

New seat: Eltham and East Wickham
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
BexleyEast Wickham8,319Old Bexley and Sidcup3,3582,1731722316900546,057
BexleyFalconwood and Welling8,277Old Bexley and Sidcup3,5271,9711922196600486,023
GreenwichColdharbour and New Eltham9,489Eltham3,5772,91815200001466,793
GreenwichEltham North9,046Eltham3,0793,1132190000656,476
GreenwichEltham South9,049Eltham3,1542,92821600001806,478
GreenwichEltham West7,197Eltham1,6093,32511100001085,153
GreenwichKidbrooke with Hornfair10,332Eltham2,5074,6431840000637,397
GreenwichMiddle Park and Sutcliffe9,733Eltham2,6143,96826700001186,967
GreenwichShooters Hill9,629Eltham2,2924,2333080000606,893
 Total81,071 25,71729,2721,8214501350084258,237

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


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