Norfolk North: New Boundaries 2018 Calculation

Norfolk North: Overview

Projection: LIB seat

Implied MP at 2017:Norman Lamb  (LIB)
County/Area:Norfolk (Anglia)
Electorate:73,255
Turnout:75.1%

PartyImplied 2017 VotesImplied 2017 Share
LIB25,08545.6%
CON23,38942.5%
LAB6,35311.5%
UKIP1360.2%
Green550.1%
LIB Majority1,6963.1%

See overview of other seats in Anglia.



Introduction

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

Norfolk North: Map

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

List of old seats forming part of Norfolk North

The old seat(s) needed are:

Old seat: Broadland

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

Old seat: BroadlandTransfer-adjusted Results
DistrictWardElectorate
2017		New SeatCON
Votes		LAB
Votes		LIB
Votes		UKIP
Votes		Green
Votes		NAT
Votes		MIN
Votes		OTH
Votes		Total
Votes
BroadlandAcle2,116Broadland and Fakenham9655258654210001,651
BroadlandAylsham5,972Norfolk North2,3591,297486136550004,333
BroadlandBlofield with South Walsham4,443Broadland and Fakenham1,988976183101340003,282
BroadlandBrundall4,441Broadland and Fakenham2,102923244100400003,409
BroadlandBurlingham2,057Broadland and Fakenham8315639648170001,555
BroadlandBuxton2,043Broadland and Fakenham81743816747520001,521
BroadlandColtishall2,019Broadland and Fakenham9764579444180001,589
BroadlandDrayton North2,083Broadland and Fakenham1,05159219458210001,916
BroadlandDrayton South1,963Broadland and Fakenham86235211539130001,381
BroadlandEynesford2,448Broadland and Fakenham1,09956919256230001,939
BroadlandGreat Witchingham1,993Broadland and Fakenham88642611319140001,458
BroadlandHevingham2,121Broadland and Fakenham1,01746813547160001,683
BroadlandHorsford and Felthorpe3,667Broadland and Fakenham1,63184528989280002,882
BroadlandMarshes2,363Broadland and Fakenham1,10162810855170001,909
BroadlandPlumstead2,360Broadland and Fakenham1,16245711653570001,845
BroadlandReepham1,972Broadland and Fakenham89146917046220001,598
BroadlandSpixworth with St Faiths4,260Broadland and Fakenham1,6431,005393107390003,187
BroadlandTaverham North3,779Broadland and Fakenham1,79092932594380003,176
BroadlandTaverham South3,636Broadland and Fakenham1,72966517478780002,724
BroadlandWroxham3,879Broadland and Fakenham1,83077527387290002,994
North NorfolkAstley1,774Broadland and Fakenham8583485118430001,318
North NorfolkLancaster North2,791Broadland and Fakenham1,0717699937580002,034
North NorfolkLancaster South3,186Broadland and Fakenham1,25289414778700002,441
North NorfolkThe Raynhams1,957Broadland and Fakenham9164615626450001,504
North NorfolkWalsingham1,750Broadland and Fakenham7873754537400001,284
North NorfolkWensum1,824Broadland and Fakenham7913839840440001,356
 Total72,897 32,40516,5894,4491,59493200055,969

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

Old seat: Norfolk North

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

Old seat: Norfolk NorthTransfer-adjusted Results
DistrictWardElectorate
2017		New SeatCON
Votes		LAB
Votes		LIB
Votes		UKIP
Votes		Green
Votes		NAT
Votes		MIN
Votes		OTH
Votes		Total
Votes
North NorfolkBriston1,955Broadland and Fakenham718126661000001,505
North NorfolkChaucer1,920Norfolk North62897661000001,386
North NorfolkCorpusty1,872Norfolk North643166623000001,432
North NorfolkCromer Town2,825Norfolk North8013211,151000002,273
North NorfolkErpingham1,898Norfolk North72798612000001,437
North NorfolkGaunt1,958Norfolk North644125743000001,512
North NorfolkGlaven Valley1,719Norfolk North53853668000001,259
North NorfolkHappisburgh2,013Norfolk North624110735000001,469
North NorfolkHigh Heath1,549Norfolk North52860581000001,169
North NorfolkHolt2,868Norfolk North8502401,258000002,348
North NorfolkHoveton1,834Norfolk North62198476000001,195
North NorfolkMundesley3,328Norfolk North1,2022861,120000002,608
North NorfolkNorth Walsham East3,305Norfolk North8363381,414000002,588
North NorfolkNorth Walsham North3,135Norfolk North7633251,499000002,587
North NorfolkNorth Walsham West3,308Norfolk North8324281,359000002,619
North NorfolkPoppyland1,988Norfolk North743118608000001,469
North NorfolkPriory3,164Norfolk North1,0332351,142000002,410
North NorfolkRoughton1,896Norfolk North669108576000001,353
North NorfolkScottow1,956Norfolk North816152861000001,829
North NorfolkSheringham North2,761Norfolk North8502251,129000002,204
North NorfolkSheringham South3,116Norfolk North1,0451821,106000002,333
North NorfolkSt Benet1,781Norfolk North54673697000001,316
North NorfolkStalham and Sutton3,355Norfolk North9863481,323000002,657
North NorfolkSuffield Park3,177Norfolk North9474141,136000002,497
North NorfolkThe Runtons1,754Norfolk North58678664000001,328
North NorfolkWaterside3,535Norfolk North1,2791741,137000002,590
North NorfolkWaxham1,764Norfolk North606101641000001,348
North NorfolkWorstead1,906Norfolk North687103679000001,469
 Total67,640 21,7485,18225,2600000052,190

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

New seat: Norfolk North

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

New seat: Norfolk North
DistrictWardElectorate
2017		Old Seat CON
Votes		LAB
Votes		LIB
Votes		UKIP
Votes		Green
Votes		NAT
Votes		MIN
Votes		OTH
Votes		Total
Votes
BroadlandAylsham5,987Broadland2,3591,297486136550004,333
North NorfolkChaucer1,839Norfolk North62897661000001,386
North NorfolkCorpusty1,900Norfolk North643166623000001,432
North NorfolkCromer Town3,016Norfolk North8013211,151000002,273
North NorfolkErpingham1,908Norfolk North72798612000001,437
North NorfolkGaunt2,006Norfolk North644125743000001,512
North NorfolkGlaven Valley1,671Norfolk North53853668000001,259
North NorfolkHappisburgh1,950Norfolk North624110735000001,469
North NorfolkHigh Heath1,551Norfolk North52860581000001,169
North NorfolkHolt3,116Norfolk North8502401,258000002,348
North NorfolkHoveton1,586Norfolk North62198476000001,195
North NorfolkMundesley3,462Norfolk North1,2022861,120000002,608
North NorfolkNorth Walsham East3,434Norfolk North8363381,414000002,588
North NorfolkNorth Walsham North3,434Norfolk North7633251,499000002,587
North NorfolkNorth Walsham West3,475Norfolk North8324281,359000002,619
North NorfolkPoppyland1,951Norfolk North743118608000001,469
North NorfolkPriory3,198Norfolk North1,0332351,142000002,410
North NorfolkRoughton1,796Norfolk North669108576000001,353
North NorfolkScottow2,428Norfolk North816152861000001,829
North NorfolkSheringham North2,925Norfolk North8502251,129000002,204
North NorfolkSheringham South3,096Norfolk North1,0451821,106000002,333
North NorfolkSt Benet1,747Norfolk North54673697000001,316
North NorfolkStalham and Sutton3,526Norfolk North9863481,323000002,657
North NorfolkSuffield Park3,313Norfolk North9474141,136000002,497
North NorfolkThe Runtons1,763Norfolk North58678664000001,328
North NorfolkWaterside3,439Norfolk North1,2791741,137000002,590
North NorfolkWaxham1,789Norfolk North606101641000001,348
North NorfolkWorstead1,949Norfolk North687103679000001,469
 Total73,255 23,3896,35325,0851365500055,018

And these are the implied results for 2017 for the new seat of Norfolk North. Please note that the wards used are those of 2015 in order to be consistent with those used by the Boundary Commissions.

© 2024 Electoral Calculus Ltd
Powered by TigerLib (14-Mar-2024 12:19, Py3L, sc1583)