Nottingham East and Carlton: New Boundaries 2018 Calculation

Nottingham East and Carlton: Overview

Projection: LAB seat

Implied MP at 2017:Vernon Coaker  (LAB)
County/Area:Nottinghamshire (East Midlands)
Electorate:81,526
Turnout:68.1%

PartyImplied 2017 VotesImplied 2017 Share
LAB34,52462.1%
CON17,78832.0%
UKIP1,2342.2%
LIB1,1682.1%
Green7151.3%
OTH1290.2%
LAB Majority16,73630.1%

See overview of other seats in East Midlands.



Introduction

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

Nottingham East and Carlton: Map

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

List of old seats forming part of Nottingham East and Carlton

The old seat(s) needed are:

Old seat: Gedling

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

Old seat: GedlingTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
GedlingBestwood St Albans2,418Sherwood7861,0152444110001,880
GedlingCarlton4,072Nottingham East and Carlton1,2261,6806165160003,048
GedlingCarlton Hill5,934Nottingham East and Carlton1,7612,761119111290004,781
GedlingCavendish4,082Nottingham East and Carlton1,2401,6787775190003,089
GedlingColwick2,015Nottingham East and Carlton6958211134220001,583
GedlingCoppice4,501Sherwood1,4441,7303772540003,337
GedlingDaybrook4,173Sherwood1,0862,0533775210003,272
GedlingErnehale4,526Sherwood1,4691,7428479590003,433
GedlingGedling4,415Nottingham East and Carlton1,4761,6219076590003,322
GedlingNetherfield3,867Nottingham East and Carlton1,0981,9745974570003,262
GedlingPhoenix4,131Nottingham East and Carlton1,2531,7239984230003,182
GedlingPlains5,670Sherwood2,0141,5758679570003,811
GedlingPorchester6,225Nottingham East and Carlton1,9472,3578693360004,519
GedlingRedhill4,666Sherwood1,3491,5912866160003,050
GedlingTrent Valley4,136Nottingham East and Carlton1,6431,1416459150002,922
GedlingWoodthorpe4,379Sherwood1,6521,3739359240003,201
 Total69,210 22,13926,8351,0551,14551800051,692

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

Old seat: Nottingham East

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

Old seat: Nottingham EastTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
NottinghamArboretum6,187Nottingham East and Carlton9293,9731341089300445,281
NottinghamBerridge10,694Nottingham North1,4845,41222711013500347,402
NottinghamDales10,035Nottingham East and Carlton1,3954,8499714710400406,632
NottinghamMapperley9,964Nottingham East and Carlton1,8493,94417514411700326,261
NottinghamSherwood10,027Nottingham North1,5803,92127514412400336,077
NottinghamSt Ann's10,225Nottingham East and Carlton1,2766,0029616412500137,676
 Total57,132 8,51328,1011,0048176980019639,329

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

New seat: Nottingham East and Carlton

The new seat of Nottingham East and Carlton is made up of the following wards, with the transfer-adjusted votes shown.

New seat: Nottingham East and Carlton
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
GedlingCarlton4,201Gedling1,2261,6806165160003,048
GedlingCarlton Hill6,588Gedling1,7612,761119111290004,781
GedlingCavendish4,255Gedling1,2401,6787775190003,089
GedlingColwick2,181Gedling6958211134220001,583
GedlingGedling4,576Gedling1,4761,6219076590003,322
GedlingNetherfield4,495Gedling1,0981,9745974570003,262
GedlingPhoenix4,384Gedling1,2531,7239984230003,182
GedlingPorchester6,226Gedling1,9472,3578693360004,519
GedlingTrent Valley4,026Gedling1,6431,1416459150002,922
NottinghamArboretum8,293Nottingham East9293,9731341089300445,281
NottinghamDales10,415Nottingham East1,3954,8499714710400406,632
NottinghamMapperley9,832Nottingham East1,8493,94417514411700326,261
NottinghamSt Ann's12,054Nottingham East1,2766,0029616412500137,676
 Total81,526 17,78834,5241,1681,2347150012955,558

And these are the implied results for 2017 for the new seat of Nottingham East and Carlton. 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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