Bexhill and Battle: New Boundaries 2018 Calculation

Bexhill and Battle: Overview

Projection: CON seat

Implied MP at 2017:Huw Merriman  (CON)
County/Area:East Sussex (South East)
Electorate:78,509
Turnout:75.7%

PartyImplied 2017 VotesImplied 2017 Share
CON36,85462.0%
LAB14,68924.7%
LIB4,4837.5%
UKIP2,0043.4%
Green1,4402.4%
CON Majority22,16537.3%

See overview of other seats in South East.



Introduction

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

Bexhill and Battle: Map

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

List of old seats forming part of Bexhill and Battle

The old seat(s) needed are:

Old seat: Bexhill and Battle

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

Old seat: Bexhill and BattleTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
RotherBattle Town3,912Bexhill and Battle1,75174550759580003,120
RotherCentral3,872Bexhill and Battle1,5501,319216139650003,289
RotherCollington3,679Bexhill and Battle1,5846071381141140002,557
RotherCrowhurst2,024Bexhill and Battle96636916051220001,568
RotherDarwell3,920Bexhill and Battle2,0156212381061220003,102
RotherEwhurst and Sedlescombe2,036Bexhill and Battle1,04627915028240001,527
RotherKewhurst3,884Bexhill and Battle1,821641143109430002,757
RotherOld Town2,984Bexhill and Battle1,167632318951040002,316
RotherRother Levels3,752Bexhill and Battle1,80056325392380002,746
RotherSackville3,653Bexhill and Battle1,513787158131490002,638
RotherSalehurst3,417Bexhill and Battle1,67458437750420002,727
RotherSidley3,937Bexhill and Battle1,5731,517148135520003,425
RotherSt Marks3,779Bexhill and Battle1,754619132130420002,677
RotherSt Michaels3,707Bexhill and Battle1,645886176145510002,903
RotherSt Stephens3,693Bexhill and Battle1,613848251124480002,884
RotherTicehurst and Etchingham3,410Bexhill and Battle1,921470213461000002,750
WealdenCross in Hand / Five Ashes1,975Bexhill and Battle1,1552026022200001,459
WealdenHeathfield East1,933Bexhill and Battle1,1592105122190001,461
WealdenHeathfield North and Central6,091Bexhill and Battle3,424868226901850004,793
WealdenHerstmonceux2,209Bexhill and Battle1,1993288460280001,699
WealdenNinfield and Hooe with Wartling1,914Bexhill and Battle1,1172386126220001,464
WealdenPevensey and Westham7,437Bexhill and Battle3,4071,3564232301920005,608
WealdenPolegate North3Lewes and West Wealden110000002
 Total77,221 36,85514,6904,4832,0041,44000059,472

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

New seat: Bexhill and Battle

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

New seat: Bexhill and Battle
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
RotherBattle Town4,119Bexhill and Battle1,75174550759580003,120
RotherCentral4,340Bexhill and Battle1,5501,319216139650003,289
RotherCollington3,375Bexhill and Battle1,5846071381141140002,557
RotherCrowhurst2,069Bexhill and Battle96636916051220001,568
RotherDarwell4,096Bexhill and Battle2,0156212381061220003,102
RotherEwhurst and Sedlescombe2,017Bexhill and Battle1,04627915028240001,527
RotherKewhurst3,640Bexhill and Battle1,821641143109430002,757
RotherOld Town3,056Bexhill and Battle1,167632318951040002,316
RotherRother Levels3,624Bexhill and Battle1,80056325392380002,746
RotherSackville3,484Bexhill and Battle1,513787158131490002,638
RotherSalehurst3,601Bexhill and Battle1,67458437750420002,727
RotherSidley4,520Bexhill and Battle1,5731,517148135520003,425
RotherSt Marks3,534Bexhill and Battle1,754619132130420002,677
RotherSt Michaels3,832Bexhill and Battle1,645886176145510002,903
RotherSt Stephens3,809Bexhill and Battle1,613848251124480002,884
RotherTicehurst and Etchingham3,630Bexhill and Battle1,921470213461000002,750
WealdenCross in Hand / Five Ashes1,927Bexhill and Battle1,1552026022200001,459
WealdenHeathfield East1,928Bexhill and Battle1,1592105122190001,461
WealdenHeathfield North and Central6,327Bexhill and Battle3,424868226901850004,793
WealdenHerstmonceux2,243Bexhill and Battle1,1993288460280001,699
WealdenNinfield and Hooe with Wartling1,933Bexhill and Battle1,1172386126220001,464
WealdenPevensey and Westham7,405Bexhill and Battle3,4071,3564232301920005,608
 Total78,509 36,85414,6894,4832,0041,44000059,470

And these are the implied results for 2017 for the new seat of Bexhill and Battle. 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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