Broxtowe and Hucknall: New Boundaries 2018 Calculation

Broxtowe and Hucknall: Overview

Projection: CON seat

Implied MP at 2017:Anna Soubry  (CON)
County/Area:Nottinghamshire (East Midlands)
Electorate:77,634
Turnout:73.3%

PartyImplied 2017 VotesImplied 2017 Share
CON27,79848.8%
LAB24,71243.4%
UKIP1,8663.3%
LIB1,8363.2%
Green7151.3%
MIN20.0%
CON Majority3,0865.4%

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 Broxtowe and Hucknall 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.

Broxtowe and Hucknall: Map

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

List of old seats forming part of Broxtowe and Hucknall

The old seat(s) needed are:

Old seat: Ashfield

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

Old seat: AshfieldTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
AshfieldAbbey Hill2,305Ashfield6567292410411011801,642
AshfieldAnnesley and Kirkby Woodhouse5,673Ashfield1,4251,4456521220019203,359
AshfieldAshfields2,869Ashfield831647494412017101,754
AshfieldCarsic2,761Ashfield6231,097294410011301,916
AshfieldCentral and New Cross4,949Ashfield1,2811,8406621227021903,645
AshfieldHuthwaite and Brierley5,513Ashfield1,4581,445628422047403,545
AshfieldJacksdale2,611Ashfield692610303910024401,625
AshfieldKingsway2,391Ashfield58875437391108601,515
AshfieldKirkby Cross and Portland2,984Ashfield762704401103509801,749
AshfieldLarwood2,619Ashfield7457022396909501,670
AshfieldLeamington2,647Ashfield6031,129284412010601,922
AshfieldSelston5,063Ashfield1,5411,011548121059003,298
AshfieldSkegby5,261Ashfield1,4491,3266221522024703,321
AshfieldSt Mary's2,814Ashfield803751324611026501,908
AshfieldStanton Hill and Teversal2,333Ashfield683644283911024301,648
AshfieldSummit5,061Ashfield1,2971,6426118224037303,579
AshfieldSutton Junction and Harlow Wood2,698Ashfield87071242421109901,776
AshfieldThe Dales2,381Ashfield6207343638808501,521
AshfieldUnderwood2,615Ashfield752427313511027601,532
BroxtoweBrinsley1,845Ashfield61538923272206801,144
BroxtoweEastwood Hall1,907Ashfield6604223531907401,231
BroxtoweEastwood Hilltop3,857Ashfield1,0461,053636250016302,437
BroxtoweEastwood St Mary's3,261Ashfield8221,062485319021202,216
BroxtoweGreasley59Broxtowe and Hucknall211012002036
 Total76,477 20,84321,2859691,88139804,613049,989

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

Old seat: Broxtowe

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

Old seat: BroxtoweTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
BroxtoweAttenborough and Chilwell East5,538Nottingham West and Beeston2,1211,687188100650004,161
BroxtoweAwsworth, Cossall and Trowell4,050Broxtowe and Hucknall1,4501,258167131400003,046
BroxtoweBeeston Central3,431Nottingham West and Beeston1,1491,84113196590003,276
BroxtoweBeeston North3,790Nottingham West and Beeston1,2401,682208127620003,319
BroxtoweBeeston Rylands3,432Nottingham West and Beeston1,0551,49016145260002,777
BroxtoweBeeston West3,773Nottingham West and Beeston1,2191,66923177670003,263
BroxtoweBramcote5,671Broxtowe and Hucknall2,3631,507252103270004,252
BroxtoweChilwell West5,468Broxtowe and Hucknall2,0222,102166148650004,503
BroxtoweGreasley5,169Broxtowe and Hucknall1,9891,459120137170003,722
BroxtoweKimberley5,030Broxtowe and Hucknall1,6961,8938568630003,805
BroxtoweNuthall East and Strelley3,833Broxtowe and Hucknall1,6711,21055102400003,078
BroxtoweStapleford North3,282Broxtowe and Hucknall1,1261,5466255210002,810
BroxtoweStapleford South East3,687Broxtowe and Hucknall1,3661,31217850210002,927
BroxtoweStapleford South West3,827Broxtowe and Hucknall1,1781,7808355250003,121
BroxtoweToton and Chilwell Meadows6,181Broxtowe and Hucknall2,7511,728113141670004,800
BroxtoweWatnall and Nuthall West3,550Broxtowe and Hucknall1,5899564740150002,647
 Total69,712 25,98525,1202,2471,47568000055,507

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

Old seat: Sherwood

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

Old seat: SherwoodTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
AshfieldHucknall Central5,183Broxtowe and Hucknall1,7341,863171194580004,020
AshfieldHucknall North7,490Broxtowe and Hucknall2,4682,0921122171460005,035
AshfieldHucknall South5,321Broxtowe and Hucknall1,7281,854102186500003,920
AshfieldHucknall West6,931Broxtowe and Hucknall2,6462,142122237600005,207
GedlingBestwood St Albans1,434Sherwood5034963550160001,100
GedlingCalverton5,712Sherwood2,2331,545100188500004,116
GedlingDumbles2,294Sherwood1,1893462264170001,638
GedlingNewstead Abbey6,362Sherwood3,0621,09072178490004,451
GedlingPlains784Sherwood286169282216000521
GedlingRedhill29Sherwood9801000018
Newark and SherwoodBilsthorpe2,322Sherwood1,0009122439190001,994
Newark and SherwoodBoughton2,259Sherwood9108001737130001,777
Newark and SherwoodDover Beck468Newark25064353000325
Newark and SherwoodEdwinstowe and Clipstone7,426Sherwood2,7572,64280114480005,641
Newark and SherwoodFarnsfield2,133Newark1,0544272326160001,546
Newark and SherwoodOllerton6,303Sherwood2,0212,5347698370004,766
Newark and SherwoodRainworth North and Rufford4,568Sherwood1,7191,4433968270003,296
Newark and SherwoodRainworth South and Blidworth3,852Sherwood1,4301,6894865300003,262
Newark and SherwoodSouthwell1,000Newark49318040139000735
 Total71,871 27,49222,2961,1141,80266400053,368

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

New seat: Broxtowe and Hucknall

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

New seat: Broxtowe and Hucknall
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
AshfieldHucknall Central5,738Sherwood1,7341,863171194580004,020
AshfieldHucknall North7,189Sherwood2,4682,0921122171460005,035
AshfieldHucknall South5,597Sherwood1,7281,854102186500003,920
AshfieldHucknall West7,436Sherwood2,6462,142122237600005,207
BroxtoweAwsworth, Cossall and Trowell4,061Broxtowe1,4501,258167131400003,046
BroxtoweBramcote5,670Broxtowe2,3631,507252103270004,252
BroxtoweChilwell West6,004Broxtowe2,0222,102166148650004,503
BroxtoweGreasley56Ashfield211012002036
BroxtoweGreasley4,964Broxtowe1,9891,459120137170003,722
BroxtoweKimberley5,072Broxtowe1,6961,8938568630003,805
BroxtoweNuthall East and Strelley4,104Broxtowe1,6711,21055102400003,078
BroxtoweStapleford North3,747Broxtowe1,1261,5466255210002,810
BroxtoweStapleford South East3,903Broxtowe1,3661,31217850210002,927
BroxtoweStapleford South West4,163Broxtowe1,1781,7808355250003,121
BroxtoweToton and Chilwell Meadows6,401Broxtowe2,7511,728113141670004,800
BroxtoweWatnall and Nuthall West3,529Broxtowe1,5899564740150002,647
 Total77,634 27,79824,7121,8361,86671502056,929

And these are the implied results for 2017 for the new seat of Broxtowe and Hucknall. 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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