Congleton: New Boundaries 2018 Calculation

Congleton: Overview

Projection: CON seat

Implied MP at 2017:Fiona Bruce  (CON)
County/Area:Cheshire (North West)
Electorate:76,895
Turnout:73.3%

PartyImplied 2017 VotesImplied 2017 Share
CON31,93356.6%
LAB19,24534.1%
LIB2,9105.2%
UKIP1,2892.3%
Green1,0011.8%
CON Majority12,68822.5%

See overview of other seats in North West.



Introduction

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

Congleton: Map

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

List of old seats forming part of Congleton

The old seat(s) needed are:

Old seat: Congleton

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

Old seat: CongletonTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
Cheshire EastAlsager8,998Congleton3,8412,4135111832440007,192
Cheshire EastBrereton Rural3,601Congleton1,98366312228250002,821
Cheshire EastCongleton East10,104Congleton4,5052,950427189910008,162
Cheshire EastCongleton West10,053Congleton4,3752,8855271931010008,081
Cheshire EastDane Valley7,416Congleton3,6951,3722861051470005,605
Cheshire EastMiddlewich10,089Congleton4,3253,421259242840008,331
Cheshire EastOdd Rode6,619Congleton3,0441,5172301211410005,053
Cheshire EastSandbach Elworth3,614Congleton1,55796013966310002,753
Cheshire EastSandbach Ettiley Heath and Wheelock3,580Congleton1,52090815162750002,716
Cheshire EastSandbach Heath and East3,318Congleton1,2361,18311535280002,597
Cheshire EastSandbach Town3,699Congleton1,74894013563330002,919
 Total71,091 31,82919,2122,9021,2871,00000056,230

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

Old seat: Eddisbury

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

Old seat: EddisburyTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
Cheshire EastAudlem3,715Crewe and Nantwich1,949636112744800132,832
Cheshire EastBrereton Rural196Congleton10433821000148
Cheshire EastBunbury3,530Eddisbury1,9496388628490042,754
Cheshire EastLeighton114Crewe and Nantwich462943100184
Cheshire EastWrenbury3,634Eddisbury1,9876005969420092,766
Cheshire West and ChesterChester Villages1,671Chester, City of7833305831220021,226
Cheshire West and ChesterDavenham and Moulton4,268Eddisbury1,7801,14215685310063,200
Cheshire West and ChesterFarndon3,134Eddisbury1,47054616724450062,258
Cheshire West and ChesterGowy2,376Weaver Vale1,1353857442290051,670
Cheshire West and ChesterMalpas3,444Eddisbury1,63958271284700202,387
Cheshire West and ChesterTarporley3,894Eddisbury1,81858618426260052,645
Cheshire West and ChesterTarvin and Kelsall6,973Eddisbury3,3301,139336518500184,959
Cheshire West and ChesterTattenhall3,626Eddisbury1,72361916367240092,605
Cheshire West and ChesterWeaver and Cuddington4,384Weaver Vale1,8151,055137945700353,193
Cheshire West and ChesterWinsford Over and Verdin8,848Eddisbury3,0623,45147121811900187,339
Cheshire West and ChesterWinsford Swanlow and Dene6,708Eddisbury2,2652,5103731707300145,405
Cheshire West and ChesterWinsford Wharton7,100Eddisbury2,3382,970346988700145,853
 Total67,615 29,19317,2512,8051,1107860017951,324

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

New seat: Congleton

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

New seat: Congleton
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
Cheshire EastAlsager9,810Congleton3,8412,4135111832440007,192
Cheshire EastBrereton Rural3,847Congleton1,98366312228250002,821
Cheshire EastBrereton Rural203Eddisbury10433821000148
Cheshire EastCongleton East11,132Congleton4,5052,950427189910008,162
Cheshire EastCongleton West11,020Congleton4,3752,8855271931010008,081
Cheshire EastDane Valley7,644Congleton3,6951,3722861051470005,605
Cheshire EastMiddlewich11,362Congleton4,3253,421259242840008,331
Cheshire EastOdd Rode6,892Congleton3,0441,5172301211410005,053
Cheshire EastSandbach Elworth3,757Congleton1,55796013966310002,753
Cheshire EastSandbach Ettiley Heath and Wheelock3,706Congleton1,52090815162750002,716
Cheshire EastSandbach Heath and East3,541Congleton1,2361,18311535280002,597
Cheshire EastSandbach Town3,981Congleton1,74894013563330002,919
 Total76,895 31,93319,2452,9101,2891,00100056,378

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