Lanarkshire West: New Boundaries 2018 Calculation

Lanarkshire West: Overview

 Projection: LAB seat 

Implied MP at 2017: Ged Killen  (LAB)
County/Area: Ayrshire and Lanark (Scotland)
Electorate: 76,385
Turnout: 64.7%

 Implied 2017 VotesImplied 2017 Share
LAB18,63137.7%
SNP18,09836.6%
CON9,70519.6%
LIB2,1694.4%
UKIP4570.9%
OTH3350.7%
LAB Majority5331.1%

See overview of other seats in Scotland.

Lanarkshire West : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Lanarkshire West 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 WinnerLABSNPCON
Economic Position21° Left14° Left
National Position18° Int17° Int1° Int
EU Leave %38%38%52%
British Identity24%27%29%
Good Health43%52%48%
UK Born86%93%88%
Good Education34%36%39%
Good Job39%49%51%
High SEC32%55%51%
Average Age43.748.748.5
ABC1 Class41%50%53%

Lanarkshire West ranks #536 for "Leave", #590 for "Right" and #525 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 West: 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 West 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 West

The old seat(s) needed are:

Old seat: Lanark and Hamilton East

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

Old seat: Lanark and Hamilton EastTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
South LanarkshireAvondale and Stonehouse966Lanarkshire South West258137196021100631
South LanarkshireBothwell and Uddingston9,531Lanarkshire Mid2,2651,921843801,916006,224
South LanarkshireClydesdale East3,555Dumfriesshire and Lanarkshire South East991361115220833002,322
South LanarkshireClydesdale North11,687Dumfriesshire and Lanarkshire South East2,9872,1402505202,200007,629
South LanarkshireClydesdale South583Lanarkshire Mid110127412012700380
South LanarkshireClydesdale West15,164Dumfriesshire and Lanarkshire South East2,9353,12846912903,238009,899
South LanarkshireHamilton North and East9,229Lanarkshire Mid1,8291,870703202,223006,024
South LanarkshireHamilton South11,029Lanarkshire Mid2,1992,543963402,328007,200
South LanarkshireHamilton West and Earnock754Lanarkshire West126171126017600491
South LanarkshireLarkhall14,814Lanarkshire Mid2,4783,6869521903,192009,670
 Total77,312 16,17816,0841,214550016,4440050,470

The full details of these calculations are given on the Lanark and Hamilton East seat details page. Click on "Show workings".

Old seat: Rutherglen and Hamilton West

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

Old seat: Rutherglen and Hamilton WestTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
South LanarkshireBlantyre13,486Lanarkshire West1,3753,4141567303,40101468,565
South LanarkshireCambuslang East11,872Lanarkshire West1,2143,0802575302,9150237,542
South LanarkshireCambuslang West12,033Lanarkshire West1,5932,7686454802,5650247,643
South LanarkshireHamilton North and East3,141Lanarkshire Mid489634121308310151,994
South LanarkshireHamilton South4,178Lanarkshire West648957211609830292,654
South LanarkshireHamilton West and Earnock13,661Lanarkshire West1,7893,08018812403,4700258,676
South LanarkshireRutherglen Central and North10,342Lanarkshire West1,3062,7401026602,2980566,568
South LanarkshireRutherglen South11,386Lanarkshire West1,5282,4277777302,3730537,231
 Total80,099 9,94219,1002,158466018,836037150,873

The full details of these calculations are given on the Rutherglen and Hamilton West seat details page. Click on "Show workings".

New seat: Lanarkshire West

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

New seat: Lanarkshire West
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
South LanarkshireBlantyre13,036Rutherglen and Hamilton West1,3753,4141567303,40101468,565
South LanarkshireCambuslang East11,994Rutherglen and Hamilton West1,2143,0802575302,9150237,542
South LanarkshireCambuslang West12,332Rutherglen and Hamilton West1,5932,7686454802,5650247,643
South LanarkshireHamilton South3,895Rutherglen and Hamilton West77495132140900082,679
South LanarkshireHamilton West and Earnock723Lanark and Hamilton East100170107019101479
South LanarkshireHamilton West and Earnock13,094Rutherglen and Hamilton West1,8153,08119012303,4550248,688
South LanarkshireRutherglen Central and North10,159Rutherglen and Hamilton West1,3062,7401026602,2980566,568
South LanarkshireRutherglen South11,152Rutherglen and Hamilton West1,5282,4277777302,3730537,231
 Total76,385 9,70518,6312,169457018,098033549,395

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


© 2017 Martin Baxter
Powered by TigerLib (11-Sep-2017 15:41)