Lanarkshire North: New Boundaries 2018 Calculation

Lanarkshire North: Overview

 Projection: SNP seat 

Implied MP at 2017: Stuart McDonald  (SNP)
County/Area: Glasgow area (Scotland)
Electorate: 77,877
Turnout: 64.7%

 Implied 2017 VotesImplied 2017 Share
SNP22,37744.4%
LAB17,64535.0%
CON9,29518.4%
LIB7001.4%
UKIP4010.8%
SNP Majority4,7329.4%

See overview of other seats in Scotland.

Lanarkshire North : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Lanarkshire North constituency, the 'Scotland' 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.

IndicatorSeatScotlandAll GB
Party WinnerSNPSNPCON
Economic Position21° Left14° Left
National Position19° Int17° Int1° Int
EU Leave %37%38%52%
British Identity24%27%29%
Good Health46%52%48%
UK Born92%93%88%
Good Education35%36%39%
Good Job48%49%51%
High SEC49%55%51%
Average Age49.148.748.5
ABC1 Class50%50%53%

Lanarkshire North ranks #543 for "Leave", #589 for "Right" and #527 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

Lanarkshire North: 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 Lanarkshire 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.

List of old seats forming part of Lanarkshire North

The old seat(s) needed are:

Old seat: Airdrie and Shotts

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

Old seat: Airdrie and ShottsTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
North LanarkshireAirdrie Central11,954Lanarkshire North1,5662,74877002,691007,082
North LanarkshireAirdrie North14,684Lanarkshire North2,0372,97557003,631008,700
North LanarkshireAirdrie South14,734Lanarkshire North;
Lanarkshire North East
1,6593,153340003,576008,728
North LanarkshireCoatbridge North and Glenboig531Lanarkshire North West66124120011300315
North LanarkshireFortissat11,400Lanarkshire North East1,9742,49383002,203006,753
North LanarkshireMossend and Holytown3,427Lanarkshire North East4158646000693002,032
North LanarkshireMotherwell North3,272Lanarkshire North East3309027700630001,939
North LanarkshireMurdostoun4,144Lanarkshire North East7658399800753002,455
 Total64,146 8,81214,0988040014,2900038,004

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

Old seat: Coatbridge, Chryston and Bellshill

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

Old seat: Coatbridge, Chryston and BellshillTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
North LanarkshireBellshill6,820Lanarkshire North West7631,77064001,718004,315
North LanarkshireCoatbridge North and Glenboig13,629Lanarkshire North West1,3743,422281003,545008,622
North LanarkshireCoatbridge South11,393Lanarkshire North West9413,136121003,009007,207
North LanarkshireCoatbridge West11,629Lanarkshire North West9583,66994002,636007,357
North LanarkshireCumbernauld North789Lanarkshire North109154100022500498
North LanarkshireMossend and Holytown494Lanarkshire North East4913380012200312
North LanarkshireStrathkelvin14,842Lanarkshire North West1,8123,525265003,786009,388
North LanarkshireThorniewood11,603Lanarkshire North West1,3113,38578002,565007,339
 Total71,199 7,31719,1949210017,6060045,038

The full details of these calculations are given on the Coatbridge, Chryston and Bellshill seat details page. Click on "Show workings".

Old seat: Cumbernauld, Kilsyth and Kirkintilloch East

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

Old seat: Cumbernauld, Kilsyth and Kirkintilloch EastTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
East DunbartonshireCampsie and Kirkintilloch North7,629Dunbartonshire East1,5011,27139010501,757005,024
East DunbartonshireKirkintilloch East and Twechar9,679Dunbartonshire East1,2452,4383539902,239006,374
East DunbartonshireLenzie and Kirkintilloch South98Dunbartonshire East1819700210065
North LanarkshireAbronhill, Kildrum and The Village11,561Lanarkshire North9322,3141329504,141007,614
North LanarkshireCumbernauld North13,057Lanarkshire North1,9682,64915312303,708008,601
North LanarkshireCumbernauld South15,173Lanarkshire North1,4393,40712112504,901009,993
North LanarkshireKilsyth9,357Lanarkshire North9082,760815802,356006,163
 Total66,554 8,01114,8581,237605019,1230043,834

The full details of these calculations are given on the Cumbernauld, Kilsyth and Kirkintilloch East seat details page. Click on "Show workings".

New seat: Lanarkshire North

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

New seat: Lanarkshire North
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
North LanarkshireAbronhill, Kildrum and The Village10,939Cumbernauld, Kilsyth and Kirkintilloch East9322,3141329504,141007,614
North LanarkshireAirdrie Central11,860Airdrie and Shotts1,5662,74877002,691007,082
North LanarkshireAirdrie North14,769Airdrie and Shotts2,0372,97557003,631008,700
North LanarkshireAirdrie South2,916Airdrie and Shotts3366386900724001,767
North LanarkshireCumbernauld North793Coatbridge, Chryston and Bellshill11816097022400518
North LanarkshireCumbernauld North13,115Cumbernauld, Kilsyth and Kirkintilloch East1,9592,64315411603,709008,581
North LanarkshireCumbernauld South14,153Cumbernauld, Kilsyth and Kirkintilloch East1,4393,40712112504,901009,993
North LanarkshireKilsyth9,332Cumbernauld, Kilsyth and Kirkintilloch East9082,760815802,356006,163
 Total77,877 9,29517,645700401022,3770050,418

And these are the implied results for 2017 for the new seat of Lanarkshire North.


© 2017 Martin Baxter
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