Norfolk Mid: New Boundaries 2018 Calculation

Norfolk Mid: Overview

Projection: CON seat

Implied MP at 2017:George Freeman  (CON)
County/Area:Norfolk (Anglia)
Electorate:74,671
Turnout:69.3%

PartyImplied 2017 VotesImplied 2017 Share
CON31,22060.3%
LAB15,18929.4%
LIB2,3684.6%
UKIP2,0544.0%
Green9201.8%
CON Majority16,03131.0%

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 Mid 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 Mid: Map

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

List of old seats forming part of Norfolk Mid

The old seat(s) needed are:

Old seat: Norfolk Mid

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

Old seat: Norfolk MidTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
BrecklandAll Saints and Wayland2,830Norfolk Mid1,5455377798250002,282
BrecklandAshill1,567Norfolk Mid6213004453330001,051
BrecklandAttleborough Burgh and Haverscroft3,800Norfolk Mid1,64881212069350002,684
BrecklandAttleborough Queens and Besthorpe5,052Norfolk Mid2,2091,009166172430003,599
BrecklandDereham Neatherd5,403Norfolk Mid2,1591,2541961831240003,916
BrecklandDereham Toftwood4,360Norfolk Mid1,5991,2191661681060003,258
BrecklandDereham Withburga4,321Norfolk Mid1,4211,46613874970003,196
BrecklandHermitage2,205Broadland and Fakenham9933865268170001,516
BrecklandLaunditch2,027Norfolk Mid1,0073254526180001,421
BrecklandLincoln4,065Norfolk Mid2,04566511065850002,970
BrecklandMattishall4,384Norfolk Mid1,664947119125360002,891
BrecklandNecton2,116Norfolk Mid7535034233140001,345
BrecklandSaham Toney3,769Norfolk Mid1,56977893131800002,651
BrecklandShipdham-with-Scarning4,265Norfolk Mid1,815895127140360003,013
BrecklandThe Buckenhams and Banham1,371Norfolk Mid627268341812000959
BrecklandUpper Wensum4,928Norfolk Mid2,220867131147440003,409
BrecklandWatton5,527Norfolk Mid2,2541,289186239500004,018
South NorfolkAbbey2,214Norfolk South81953017534250001,583
South NorfolkCromwells2,026Norfolk South85039018331240001,478
South NorfolkHingham and Deopham2,297Norfolk Mid97241617134210001,614
South NorfolkNorthfields2,149Norfolk South8885308036520001,586
South NorfolkRustens2,686Norfolk South9614258834550001,563
South NorfolkTown2,483Norfolk South1,12048710839660001,820
South NorfolkWicklewood2,062Norfolk Mid1,06944219877610001,847
 Total77,907 32,82816,7402,8492,0941,15900055,670

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

Old seat: Norfolk South West

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

Old seat: Norfolk South WestTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
BrecklandAll Saints and Wayland1,937Norfolk Mid1,060275567900001,470
BrecklandAshill596Norfolk Mid2468718240000375
BrecklandBedingfield2,336Thetford and Downham Market1,150278474100001,516
BrecklandForest2,162Thetford and Downham Market1,054378514200001,525
BrecklandGuiltcross2,470Norfolk Mid1,024376493800001,487
BrecklandHarling and Heathlands2,478Norfolk Mid1,152279554200001,528
BrecklandLaunditch27Norfolk Mid13300000016
BrecklandNar Valley2,081Thetford and Downham Market848292527700001,269
BrecklandSwaffham5,833Thetford and Downham Market2,62380713211100003,673
BrecklandThe Buckenhams and Banham1,139Norfolk Mid52817727190000751
BrecklandThetford Boudica3,290Thetford and Downham Market1,30088822016200002,570
BrecklandThetford Burrell3,696Thetford and Downham Market1,2511,41616318100003,011
BrecklandThetford Castle3,590Thetford and Downham Market1,6251,03125319300003,102
BrecklandThetford Priory4,044Thetford and Downham Market1,5091,74218321900003,653
King's Lynn and West NorfolkAirfield3,570Thetford and Downham Market1,92159210917300002,795
King's Lynn and West NorfolkDenton5,513Thetford and Downham Market2,6201,03313822200004,013
King's Lynn and West NorfolkDownham Old Town2,040Thetford and Downham Market759422698600001,336
King's Lynn and West NorfolkEast Downham2,208Thetford and Downham Market947518644400001,573
King's Lynn and West NorfolkEmneth with Outwell3,744Thetford and Downham Market1,5995659714000002,401
King's Lynn and West NorfolkHilgay with Denver1,901Thetford and Downham Market914233333200001,212
King's Lynn and West NorfolkMershe Lande1,993Thetford and Downham Market806306538000001,245
King's Lynn and West NorfolkNorth Downham1,843Thetford and Downham Market658309493200001,048
King's Lynn and West NorfolkSouth Downham1,903Thetford and Downham Market681302457100001,099
King's Lynn and West NorfolkSt Lawrence1,929Thetford and Downham Market925271393800001,273
King's Lynn and West NorfolkUpwell and Delph3,916Thetford and Downham Market1,6445398813600002,407
King's Lynn and West NorfolkWalton2,126Norfolk North West1,000261393800001,338
King's Lynn and West NorfolkWatlington1,957Thetford and Downham Market6643941057800001,241
King's Lynn and West NorfolkWiggenhall1,664Thetford and Downham Market664274507300001,061
King's Lynn and West NorfolkWimbotsham with Fincham2,029Thetford and Downham Market969226383400001,267
King's Lynn and West NorfolkWissey1,930Thetford and Downham Market736307436700001,153
 Total75,945 32,89014,5812,3652,572000052,408

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

New seat: Norfolk Mid

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

New seat: Norfolk Mid
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
BrecklandAll Saints and Wayland3,281Norfolk Mid1,5455377798250002,282
BrecklandAll Saints and Wayland2,185Norfolk South West1,060275567900001,470
BrecklandAshill1,510Norfolk Mid6213004453330001,051
BrecklandAshill558Norfolk South West2468718240000375
BrecklandAttleborough Burgh and Haverscroft3,859Norfolk Mid1,64881212069350002,684
BrecklandAttleborough Queens and Besthorpe5,175Norfolk Mid2,2091,009166172430003,599
BrecklandDereham Neatherd5,628Norfolk Mid2,1591,2541961831240003,916
BrecklandDereham Toftwood4,684Norfolk Mid1,5991,2191661681060003,258
BrecklandDereham Withburga4,594Norfolk Mid1,4211,46613874970003,196
BrecklandGuiltcross2,209Norfolk South West1,024376493800001,487
BrecklandHarling and Heathlands2,269Norfolk South West1,152279554200001,528
BrecklandLaunditch2,044Norfolk Mid1,0073254526180001,421
BrecklandLaunditch26Norfolk South West13300000016
BrecklandLincoln4,269Norfolk Mid2,04566511065850002,970
BrecklandMattishall4,157Norfolk Mid1,664947119125360002,891
BrecklandNecton1,933Norfolk Mid7535034233140001,345
BrecklandSaham Toney3,812Norfolk Mid1,56977893131800002,651
BrecklandShipdham-with-Scarning4,333Norfolk Mid1,815895127140360003,013
BrecklandThe Buckenhams and Banham1,380Norfolk Mid627268341812000959
BrecklandThe Buckenhams and Banham1,116Norfolk South West52817727190000751
BrecklandUpper Wensum4,899Norfolk Mid2,220867131147440003,409
BrecklandWatton5,776Norfolk Mid2,2541,289186239500004,018
South NorfolkHingham and Deopham2,319Norfolk Mid97241617134210001,614
South NorfolkWicklewood2,655Norfolk Mid1,06944219877610001,847
 Total74,671 31,22015,1892,3682,05492000051,751

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