Kilmarnock, Cumnock and Doon Valley: New Boundaries 2018 Calculation

Kilmarnock, Cumnock and Doon Valley: Overview

Projection: SNP seat

Implied MP at 2017:Alan Brown  (SNP)
County/Area:Ayrshire and Lanark (Scotland)
Electorate:81,441
Turnout:64.0%

PartyImplied 2017 VotesImplied 2017 Share
SNP20,28538.9%
LAB16,36031.4%
CON14,49527.8%
LIB9731.9%
SNP Majority3,9257.5%

See overview of other seats in Scotland.



Introduction

This page shows the detail of the calculations performed to estimate the general election result for 2017 had the new boundaries for Kilmarnock, Cumnock and Doon Valley 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.

Kilmarnock, Cumnock and Doon Valley: Map

Boundary Lines courtesy of Ordnance Survey OpenData © Crown copyright 2015, Map © OpenStreetMap contributors

List of old seats forming part of Kilmarnock, Cumnock and Doon Valley

The old seat(s) needed are:

Old seat: Ayr Carrick and Cumnock

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

Old seat: Ayr Carrick and CumnockTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
East AyrshireCumnock and New Cumnock10,279Kilmarnock, Cumnock and Doon Valley2,3082,353119002,275007,055
East AyrshireDoon Valley8,299Kilmarnock, Cumnock and Doon Valley1,8861,99993001,756005,734
South AyrshireAyr East11,391Ayr and Carrick3,2751,232177002,598007,282
South AyrshireAyr North10,483Ayr and Carrick2,1362,375146002,617007,274
South AyrshireAyr West11,731Ayr and Carrick4,189783156002,279007,407
South AyrshireGirvan and South Carrick7,502Ayr and Carrick2,0711,07184001,784005,010
South AyrshireMaybole, North Carrick and Coylton9,830Ayr and Carrick2,6851,21096002,467006,458
 Total69,515 18,55011,0238710015,7760046,220

The full details of these calculations are given on the Ayr Carrick and Cumnock seat details page. Click on "Show workings".

Old seat: Ayrshire Central

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

Old seat: Ayrshire CentralTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
North AyrshireIrvine East14,672Arran and Cunninghame2,8013,010355004,1350010,301
North AyrshireIrvine West14,291Arran and Cunninghame2,5783,408271003,8240010,081
North AyrshireKilwinning2,164Arran and Cunninghame3864782900550001,443
South AyrshireAyr North1,691Ayr and Carrick2653981800413001,094
South AyrshireKyle9,177Kilmarnock, Cumnock and Doon Valley2,1781,51659002,081005,834
South AyrshireMaybole, North Carrick and Coylton840Ayr and Carrick23713870024900631
South AyrshirePrestwick12,084Ayr and Carrick3,4221,489197002,839007,947
South AyrshireTroon11,789Ayr and Carrick3,6381,325114002,681007,758
 Total66,708 15,50511,7621,0500016,7720045,089

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

Old seat: Kilmarnock and Loudoun

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

Old seat: Kilmarnock and LoudounTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
East AyrshireAnnick9,577Eastwood and Loudoun2,1101,252158002,423005,943
East AyrshireBallochmyle10,584Kilmarnock, Cumnock and Doon Valley1,6542,597124002,658007,033
East AyrshireCumnock and New Cumnock28Kilmarnock, Cumnock and Doon Valley4700060017
East AyrshireIrvine Valley11,054Eastwood and Loudoun;
Kilmarnock, Cumnock and Doon Valley
2,2071,704136003,145007,192
East AyrshireKilmarnock East and Hurlford11,099Kilmarnock, Cumnock and Doon Valley1,6532,374169003,093007,289
East AyrshireKilmarnock North9,044Kilmarnock, Cumnock and Doon Valley1,4801,704122002,843006,149
East AyrshireKilmarnock South7,757Kilmarnock, Cumnock and Doon Valley1,1061,938114002,174005,332
East AyrshireKilmarnock West and Crosshouse11,999Kilmarnock, Cumnock and Doon Valley2,1901,844171003,348007,553
 Total71,142 12,40413,4209940019,6900046,508

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

New seat: Kilmarnock, Cumnock and Doon Valley

The new seat of Kilmarnock, Cumnock and Doon Valley is made up of the following wards, with the transfer-adjusted votes shown.

New seat: Kilmarnock, Cumnock and Doon Valley
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
East AyrshireBallochmyle11,089Kilmarnock and Loudoun1,6542,597124002,658007,033
East AyrshireCumnock and New Cumnock10,874Ayr Carrick and Cumnock2,3082,353119002,275007,055
East AyrshireCumnock and New Cumnock28Kilmarnock and Loudoun4700060017
East AyrshireDoon Valley8,837Ayr Carrick and Cumnock1,8861,99993001,756005,734
East AyrshireIrvine Valley186Kilmarnock and Loudoun36282005100117
East AyrshireKilmarnock East and Hurlford11,490Kilmarnock and Loudoun1,6532,374169003,093007,289
East AyrshireKilmarnock North9,695Kilmarnock and Loudoun1,4801,704122002,843006,149
East AyrshireKilmarnock South8,406Kilmarnock and Loudoun1,1061,938114002,174005,332
East AyrshireKilmarnock West and Crosshouse11,908Kilmarnock and Loudoun2,1901,844171003,348007,553
South AyrshireKyle8,928Ayrshire Central2,1781,51659002,081005,834
 Total81,441 14,49516,3609730020,2850052,113

And these are the implied results for 2017 for the new seat of Kilmarnock, Cumnock and Doon Valley. 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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