South Holland and The Deepings: New Boundaries 2018 Calculation

South Holland and The Deepings: Overview

 Projection: CON seat 

Implied MP at 2017: John Hayes  (CON)
County/Area: Lincolnshire (East Midlands)
Electorate: 74,332
Turnout: 67.7%

 Implied 2017 VotesImplied 2017 Share
CON35,17969.9%
LAB10,28120.4%
UKIP2,1864.3%
LIB1,4332.8%
Green8941.8%
OTH3440.7%
CON Majority24,89849.5%

See overview of other seats in East Midlands.

South Holland and The Deepings : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new South Holland and The Deepings constituency, the 'East Midlands' area and nation.

The political measures include the Left/Right and International/National axes (what does this mean).

The demographic measures are from the 2011 Census and include categories relating to national identity, economic activity, health and education. These categories are those which have the most relevance to political attitudes.

IndicatorSeatEast MidlandsAll GB
Party WinnerCONCONCON
Economic Position19° Right3° Right
National Position22° Nat9° Nat1° Int
EU Leave %72%59%52%
British Identity28%27%29%
Good Health47%45%48%
UK Born95%91%88%
Good Education40%36%39%
Good Job54%48%51%
High SEC57%47%51%
Average Age51.949.148.5
ABC1 Class57%50%53%

South Holland and The Deepings ranks #11 for "Leave", #23 for "Right" and #6 for "National" out of 600 new seats.

Indicators: Legend and Descriptions

Indicators : Legend and Descriptions

The colour scheme used in the table above is explained in the legend table below. The eight census indicators (British Identity, Good Health, UK Born, Good Education, Good Job, High SEC, Average Age and AB1 Class) all use the same 'Census' colour scheme indicating whether the area's level is above or below the national average.

TopicCat 1Cat 2Cat 3Cat 4Cat 5
Economic PositionVery LeftLeftCentristRightVery Right
National PositionVery IntInternationalCentristNationalVery Nat
EU Leave %Very RemainRemainBalancedLeaveVery Leave
CensusVery LowLowMediumHighVery High

Indicator definitions are given in terms of political data definitions or census categories:

IndicatorCensus
Question
Definition / Included Census Categories
Party WinnerArea party winner : actual election result or projected by Electoral Calculus
Economic PositionEconomic position between 100° Left and 100° Right, estimated by Electoral Calculus from political and demographic data.
National PositionNational position between 100° International and 100° National, estimated by Electoral Calculus from political and demographic data.
EU Leave %EU Referendum vote share for 'Leave' : actual result or estimate
British IdentityNational Identity (KS202)Those answering British, British-Other, or Scottish-British
Good HealthHealth (KS301)Those answering 'Very Good Health'
UK BornCountry of Birth (QS203)Those answering England, Northern Ireland, Scotland, Wales, GB Other, or UK Other
Good EducationHighest level of Qualification (QS501)Level 3 (A-level equivalent) or Level 4+ (degree equivalent)
Good JobOccupation (QS606)Occupation codes 1xx to 4xx (Managers, Professionals, Associates, and office workers)
High SECNS-SeC of Household Reference Person (QS609)National Statistics Socio-economic Classification from 1 to 4 (higher managers and professionals, lower managers and professionals, intermediate occupations, small employers and self-employed).
Average AgeAge (QS103)Average age of adults (18 years and above)
ABC1 ClassApproximated Social Grade (QS611)Approximated social grades A, B and C1

South Holland and The Deepings: Map

Boundary Lines courtesy of Ordnance Survey OpenData © Crown copyright 2015

Introduction

This page shows the detail of the calculations performed to estimate the general election result for 2017 had the new boundaries for South Holland and The Deepings 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.

List of old seats forming part of South Holland and The Deepings

The old seat(s) needed are:

Old seat: South Holland and The Deepings

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

Old seat: South Holland and The DeepingsTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
South HollandCrowland and Deeping St Nicholas4,631South Holland and The Deepings2,1785375611214500233,051
South HollandDonington, Quadring and Gosberton5,305South Holland and The Deepings2,78453153772800223,495
South HollandFleet1,659South Holland and The Deepings8471535217180061,093
South HollandGedney1,739South Holland and The Deepings7942291683150081,145
South HollandHolbeach Hurn1,697South Holland and The Deepings8651852721130071,118
South HollandHolbeach Town5,579South Holland and The Deepings2,7285691161935200173,675
South HollandLong Sutton5,444South Holland and The Deepings2,3838741071325100383,585
South HollandMoulton, Weston and Cowbit5,119South Holland and The Deepings2,5205181401621700153,372
South HollandPinchbeck and Surfleet5,128South Holland and The Deepings2,745405501313000173,378
South HollandSpalding Castle1,912South Holland and The Deepings92918413249900111,260
South HollandSpalding Monks House3,970South Holland and The Deepings1,607713631744000182,615
South HollandSpalding St John's4,568South Holland and The Deepings1,838804781837800293,010
South HollandSpalding St Mary's3,751South Holland and The Deepings1,733493471493600122,470
South HollandSpalding St Paul's3,940South Holland and The Deepings1,76850826237480092,596
South HollandSpalding Wygate3,474South Holland and The Deepings1,74642245332400192,289
South HollandSutton Bridge3,362South Holland and The Deepings1,260686371624700232,215
South HollandThe Saints1,920South Holland and The Deepings98319919401300111,265
South HollandWhaplode and Holbeach St John's3,170South Holland and The Deepings1,65921844141220042,088
South KestevenDeeping St James5,287South Holland and The Deepings1,9541,287148165300253,483
South KestevenMarket and West Deeping4,726South Holland and The Deepings1,858766296996500303,114
 Total76,381 35,17910,2811,4332,1868940034450,317

The full details of these calculations are given on the South Holland and The Deepings seat details page. Click on "Show workings".

New seat: South Holland and The Deepings

The new seat of South Holland and The Deepings is made up of the following wards, with the transfer-adjusted votes shown.

New seat: South Holland and The Deepings
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
NAT
Votes
MIN
Votes
OTH
Votes
Total
Votes
South HollandCrowland and Deeping St Nicholas4,596South Holland and The Deepings2,1785375611214500233,051
South HollandDonington, Quadring and Gosberton5,503South Holland and The Deepings2,78453153772800223,495
South HollandFleet1,745South Holland and The Deepings8471535217180061,093
South HollandGedney1,828South Holland and The Deepings7942291683150081,145
South HollandHolbeach Hurn1,679South Holland and The Deepings8651852721130071,118
South HollandHolbeach Town5,480South Holland and The Deepings2,7285691161935200173,675
South HollandLong Sutton5,831South Holland and The Deepings2,3838741071325100383,585
South HollandMoulton, Weston and Cowbit5,232South Holland and The Deepings2,5205181401621700153,372
South HollandPinchbeck and Surfleet5,193South Holland and The Deepings2,745405501313000173,378
South HollandSpalding Castle1,547South Holland and The Deepings92918413249900111,260
South HollandSpalding Monks House3,406South Holland and The Deepings1,607713631744000182,615
South HollandSpalding St John's3,362South Holland and The Deepings1,838804781837800293,010
South HollandSpalding St Mary's3,226South Holland and The Deepings1,733493471493600122,470
South HollandSpalding St Paul's2,990South Holland and The Deepings1,76850826237480092,596
South HollandSpalding Wygate3,502South Holland and The Deepings1,74642245332400192,289
South HollandSutton Bridge3,173South Holland and The Deepings1,260686371624700232,215
South HollandThe Saints1,975South Holland and The Deepings98319919401300111,265
South HollandWhaplode and Holbeach St John's3,368South Holland and The Deepings1,65921844141220042,088
South KestevenDeeping St James5,561South Holland and The Deepings1,9541,287148165300253,483
South KestevenMarket and West Deeping5,135South Holland and The Deepings1,858766296996500303,114
 Total74,332 35,17910,2811,4332,1868940034450,317

And these are the implied results for 2017 for the new seat of South Holland and The Deepings.


© 2017 Martin Baxter
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