Clyde Coast: New Boundaries 2018 Calculation

Clyde Coast: Overview

 Projection: SNP seat 

Implied MP at 2017: Ronnie Cowan  (SNP)
County/Area: Glasgow area (Scotland)
Electorate: 76,719
Turnout: 66.3%

 Implied 2017 VotesImplied 2017 Share
SNP19,93539.2%
LAB16,61432.6%
CON13,05825.7%
LIB1,2882.5%
SNP Majority3,3216.5%

See overview of other seats in Scotland.

Clyde Coast : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Clyde Coast constituency, the 'Scotland' 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.

IndicatorSeatScotlandAll GB
Party WinnerSNPSNPCON
Economic Position27° Left23° Left
National Position14° Int15° Int
EU Leave %36%38%52%
British Identity28%27%29%
Good Health51%52%48%
UK Born97%93%88%
Good Education34%36%39%
Good Job49%49%51%
High SEC54%55%51%
Average Age51.148.748.5
ABC1 Class48%50%53%

Clyde Coast ranks #553 for "Leave", #562 for "Right" and #524 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

Clyde Coast: 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 Clyde Coast 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 Clyde Coast

The old seat(s) needed are:

Old seat: Ayrshire North and Arran

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

Old seat: Ayrshire North and ArranTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
North AyrshireKilwinning11,103Arran and Cunninghame2,0312,335232002,599007,197
North AyrshireSaltcoats and Stevenston15,718Arran and Cunninghame2,6853,849176003,4790010,189
North AyrshireArdrossan and Arran13,271Arran and Cunninghame2,6542,227231003,491008,603
North AyrshireDalry and West Kilbride9,393Arran and Cunninghame;
Renfrewshire West and Garnock Valley
2,2581,342139002,350006,089
North AyrshireKilbirnie and Beith11,018Renfrewshire West and Garnock Valley2,0262,027158002,930007,141
North AyrshireNorth Coast and Cumbraes12,671Clyde Coast3,1641,260188003,602008,214
 Total73,174 14,81813,0401,1240018,4510047,433

The full details of these calculations are given on the Ayrshire North and Arran seat details page. Click on "Show workings".

Old seat: Inverclyde

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

Old seat: InverclydeTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
InverclydeInverclyde East12,365Clyde Coast2,3502,739178002,947008,214
InverclydeInverclyde East Central10,035Clyde Coast1,0903,121102002,353006,666
InverclydeInverclyde North11,385Clyde Coast1,5642,971215002,812007,562
InverclydeInverclyde South8,475Clyde Coast8722,500117002,140005,629
InverclydeInverclyde West7,897Clyde Coast1,3101,545174002,216005,245
InverclydeInverclyde South West8,695Clyde Coast1,2131,789191002,581005,774
 Total58,852 8,39914,6659770015,0490039,090

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

Old seat: Paisley and Renfrewshire North

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

Old seat: Paisley and Renfrewshire NorthTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
RenfrewshireRenfrew North9,766Paisley1,6172,172206002,756006,751
RenfrewshireRenfrew South and Gallowhill11,221Paisley1,8122,777189002,979007,757
RenfrewshirePaisley East and Ralston5,835Paisley9931,256256001,529004,034
RenfrewshirePaisley North West6,531Paisley9811,737162001,635004,515
RenfrewshireHouston, Crosslee and Linwood12,122Renfrewshire West and Garnock Valley2,3343,006182002,857008,379
RenfrewshireBishopton, Bridge of Weir and Langbank8,679Clyde Coast;
Renfrewshire West and Garnock Valley
2,4981,151205002,145005,999
RenfrewshireErskine and Inchinnan13,281Renfrewshire West and Garnock Valley2,6072,744276003,553009,180
 Total67,435 12,84214,8431,4760017,4540046,615

The full details of these calculations are given on the Paisley and Renfrewshire North seat details page. Click on "Show workings".

New seat: Clyde Coast

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

New seat: Clyde Coast
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
InverclydeInverclyde East12,365Inverclyde2,3502,739178002,947008,214
InverclydeInverclyde East Central10,035Inverclyde1,0903,121102002,353006,666
InverclydeInverclyde North11,385Inverclyde1,5642,971215002,812007,562
InverclydeInverclyde South8,475Inverclyde8722,500117002,140005,629
InverclydeInverclyde South West8,695Inverclyde1,2131,789191002,581005,774
InverclydeInverclyde West7,897Inverclyde1,3101,545174002,216005,245
North AyrshireNorth Coast and Cumbraes12,671Ayrshire North and Arran3,1641,260188003,602008,214
RenfrewshireBishopton, Bridge of Weir and Langbank5,196Paisley and Renfrewshire North1,495689123001,284003,591
 Total76,719 13,05816,6141,2880019,9350050,895

And these are the implied results for 2017 for the new seat of Clyde Coast. 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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