Stirling and Falkirk North: New Boundaries 2018 Calculation

Stirling and Falkirk North: Overview

 Projection: SNP seat 

Implied MP at 2017: Johnny McNally  (SNP)
County/Area: Central (Scotland)
Electorate: 71,177
Turnout: 71.7%

 Implied 2017 VotesImplied 2017 Share
SNP19,48938.2%
LAB15,63430.6%
CON13,45626.4%
LIB1,2742.5%
Green5401.1%
UKIP4570.9%
OTH1960.4%
SNP Majority3,8557.6%

See overview of other seats in Scotland.

Stirling and Falkirk North : Political and Demographic indicators

The table below shows some political and demographic numerical indicators for the new Stirling and Falkirk 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 Position17° Left14° Left
National Position16° Int17° Int1° Int
EU Leave %39%38%52%
British Identity25%27%29%
Good Health45%52%48%
UK Born96%93%88%
Good Education39%36%39%
Good Job46%49%51%
High SEC47%55%51%
Average Age53.048.748.5
ABC1 Class47%50%53%

Stirling and Falkirk North ranks #519 for "Leave", #558 for "Right" and #501 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

Stirling and Falkirk 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 Stirling and Falkirk 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 Stirling and Falkirk North

The old seat(s) needed are:

Old seat: Falkirk

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

Old seat: FalkirkTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
FalkirkBonnybridge and Larbert12,608Stirling and Falkirk North2,3862,1622471371963,121008,249
FalkirkCarse, Kinnaird and Tryst14,409Stirling and Falkirk North1,8393,397232891153,756009,428
FalkirkDenny and Banknock13,937Stirling and Falkirk North2,5422,4162452031993,514009,119
FalkirkFalkirk North15,091Falkirk South2,0303,01594921254,516009,872
FalkirkFalkirk South14,219Falkirk South;
Stirling and Falkirk North
2,6403,0231431281363,233009,303
FalkirkGrangemouth235Falkirk South44473335300153
FalkirkLower Braes8,881Falkirk South2,1391,378131401062,018005,812
FalkirkUpper Braes2,860Falkirk South467591242028742001,872
 Total82,240 14,08716,0291,11971290820,9530053,808

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

Old seat: Stirling

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

Old seat: StirlingTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
StirlingBannockburn8,650Stirling and Falkirk North1,4992,17226002,6700616,428
StirlingCastle9,586Stirling and Falkirk North2,2112,013165002,62601097,124
StirlingDunblane and Bridge of Allan12,212Stirlingshire and South Perthshire4,4671,282414002,8810329,076
StirlingForth and Endrick9,182Stirlingshire and South Perthshire3,181803283002,5340236,824
StirlingStirling East9,893Stirling and Falkirk North1,8902,511282002,6460227,351
StirlingStirling West8,637Stirling and Falkirk North;
Stirlingshire and South Perthshire
2,5131,466225002,1970186,419
StirlingTrossachs and Teith8,254Stirlingshire and South Perthshire2,530654289002,5880726,133
 Total66,414 18,29110,9011,6840018,142033749,355

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

New seat: Stirling and Falkirk North

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

New seat: Stirling and Falkirk North
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
FalkirkBonnybridge and Larbert12,002Falkirk2,3862,1622471371963,121008,249
FalkirkCarse, Kinnaird and Tryst15,207Falkirk1,8393,397232891153,756009,428
FalkirkDenny and Banknock13,941Falkirk2,5422,4162452031993,514009,119
FalkirkFalkirk South2,974Falkirk583668322830714002,055
StirlingBannockburn8,330Stirling1,4992,17226002,6700616,428
StirlingCastle7,535Stirling2,2112,013165002,62601097,124
StirlingStirling East9,365Stirling1,8902,511282002,6460227,351
StirlingStirling West1,823Stirling5062954500442041,292
 Total71,177 13,45615,6341,27445754019,489019651,046

And these are the implied results for 2017 for the new seat of Stirling and Falkirk North.


© 2017 Martin Baxter
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