Liverpool Wavertree: New Boundaries 2018 Calculation

Liverpool Wavertree: Overview

 Projection: LAB seat 

Implied MP at 2017: Luciana Berger  (LAB)
County/Area: Merseyside (North West)
Electorate: 76,261
Turnout: 76.9%

 Implied 2017 VotesImplied 2017 Share
LAB46,48479.3%
CON6,65111.3%
LIB3,1535.4%
Green1,0891.9%
MIN9191.6%
OTH3520.6%
LAB Majority39,83367.9%

See overview of other seats in North West.

Liverpool Wavertree : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Liverpool Wavertree constituency, the 'North West' 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.

IndicatorSeatNorth WestAll GB
Party WinnerLABLABCON
Economic Position23° Left6° Left
National Position15° Int2° Nat1° Int
EU Leave %38%54%52%
British Identity26%28%29%
Good Health44%46%48%
UK Born91%92%88%
Good Education39%37%39%
Good Job42%49%51%
High SEC43%48%51%
Average Age46.048.648.5
ABC1 Class46%50%53%

Liverpool Wavertree ranks #529 for "Leave", #596 for "Right" and #494 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

Liverpool Wavertree: 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 Liverpool Wavertree 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 Liverpool Wavertree

The old seat(s) needed are:

Old seat: Liverpool Riverside

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

Old seat: Liverpool RiversideTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
LiverpoolCentral13,029Liverpool Riverside1,2156,6845002470008,196
LiverpoolGreenbank11,011Liverpool Wavertree7735,52922703980006,927
LiverpoolKirkdale11,044Liverpool Riverside2656,63490400006,948
LiverpoolMossley Hill8,761Liverpool Riverside1,0633,80949301470005,512
LiverpoolPrinces Park11,397Liverpool Riverside2996,5635102570007,170
LiverpoolRiverside12,206Liverpool Riverside6086,77315001470007,678
LiverpoolSt Michael's8,885Liverpool Riverside4294,60920603470005,591
 Total76,333 4,65240,6011,18601,58300048,022

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

Old seat: Liverpool Wavertree

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

Old seat: Liverpool WavertreeTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
LiverpoolChildwall9,629Liverpool Wavertree1,2744,83256204600186,732
LiverpoolChurch9,533Liverpool Wavertree1,1514,2451,136012200116,665
LiverpoolKensington and Fairfield10,335Liverpool Wavertree5876,31020907000507,226
LiverpoolOld Swan11,352Liverpool Wavertree7576,81128203100577,938
LiverpoolPicton11,655Liverpool Wavertree6257,002271020300488,149
LiverpoolWavertree9,908Liverpool Wavertree8575,518397012500316,928
 Total62,412 5,25134,7182,85705970021543,638

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

Old seat: Liverpool West Derby

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

Old seat: Liverpool West DerbyTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
LiverpoolCroxteth10,497Liverpool West Derby7836,087900560228317,275
LiverpoolKnotty Ash9,914Liverpool West Derby8325,6031280440232326,871
LiverpoolNorris Green10,916Liverpool West Derby4266,83470300242267,565
LiverpoolTuebrook and Stoneycroft11,662Liverpool Wavertree6276,2376909409191378,083
LiverpoolWest Derby10,309Liverpool West Derby9995,6001830590269357,145
LiverpoolYew Tree11,867Liverpool West Derby7957,010680460260458,224
 Total65,165 4,46237,371545032902,15030645,163

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

New seat: Liverpool Wavertree

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

New seat: Liverpool Wavertree
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
LiverpoolChildwall10,784Liverpool Wavertree1,2744,83256204600186,732
LiverpoolChurch10,373Liverpool Wavertree1,1514,2451,136012200116,665
LiverpoolGreenbank7,985Liverpool Riverside7735,52922703980006,927
LiverpoolKensington and Fairfield8,036Liverpool Wavertree5876,31020907000507,226
LiverpoolOld Swan10,679Liverpool Wavertree7576,81128203100577,938
LiverpoolPicton8,756Liverpool Wavertree6257,002271020300488,149
LiverpoolTuebrook and Stoneycroft9,675Liverpool West Derby6276,2376909409191378,083
LiverpoolWavertree9,973Liverpool Wavertree8575,518397012500316,928
 Total76,261 6,65146,4843,15301,089091935258,648

And these are the implied results for 2017 for the new seat of Liverpool Wavertree.


© 2017 Martin Baxter
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