Edinburgh North and Leith: New Boundaries 2018 Calculation

Edinburgh North and Leith: Overview

Projection: SNP seat

Implied MP at 2017:Deidre Brock  (SNP)
County/Area:Edinburgh area (Scotland)
Electorate:82,998
Turnout:71.1%

PartyImplied 2017 VotesImplied 2017 Share
SNP20,13534.1%
LAB18,24530.9%
CON15,27425.9%
LIB3,7676.4%
Green1,5842.7%
OTH140.0%
SNP Majority1,8903.2%

See overview of other seats in Scotland.



Introduction

This page shows the detail of the calculations performed to estimate the general election result for 2017 had the new boundaries for Edinburgh North and Leith 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.

Edinburgh North and Leith: Map

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

List of old seats forming part of Edinburgh North and Leith

The old seat(s) needed are:

Old seat: Edinburgh East

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

Old seat: Edinburgh EastTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
EdinburghCity Centre5,172Edinburgh East;
Edinburgh North and Leith
1,3651,319242001,937004,863
EdinburghCraigentinny / Duddingston18,777Edinburgh East1,9334,038452005,2630011,686
EdinburghLeith5,133Edinburgh East437992169001,651003,249
EdinburghLeith Walk3,253Edinburgh East3241,054107001,181002,666
EdinburghLiberton / Gilmerton191Edinburgh East19414004600110
EdinburghMeadows / Morningside2,009Edinburgh South52038811200603001,623
EdinburghPortobello / Craigmillar18,025Edinburgh East1,5065,074226004,8020011,608
EdinburghSouthside / Newington7,983Edinburgh South1,9782,179536003,028007,721
 Total60,543 8,08215,0851,8480018,5110043,526

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

Old seat: Edinburgh North and Leith

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

Old seat: Edinburgh North and LeithTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
EdinburghCity Centre6,996Edinburgh East;
Edinburgh North and Leith
1,9041,46529202211,776005,658
EdinburghForth18,985Edinburgh North and Leith3,9395,23147903504,9350014,934
EdinburghInverleith18,018Edinburgh North and Leith;
Edinburgh West
4,7493,09274104013,7780012,761
EdinburghLeith12,041Edinburgh North and Leith2,0632,70750202873,810009,369
EdinburghLeith Walk16,952Edinburgh North and Leith2,7305,12456504684,9430013,830
 Total72,992 15,38517,6192,57901,72719,2420056,552

The full details of these calculations are given on the Edinburgh North and Leith seat details page. Click on "Show workings".

Old seat: Edinburgh South West

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

Old seat: Edinburgh South WestTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
EdinburghCity Centre743Edinburgh North and Leith256171450025500727
EdinburghColinton / Fairmilehead12,238Edinburgh South4,2391,306277002,493008,315
EdinburghCorstorphine / Murrayfield576Edinburgh West17685350016300459
EdinburghDrum Brae / Gyle350Edinburgh West775918009100245
EdinburghFountainbridge / Craiglockhart15,109Edinburgh South3,2542,755703003,8340010,546
EdinburghMeadows / Morningside2,490Edinburgh South89046119900662002,212
EdinburghPentland Hills15,310Livingston and Edinburgh Pentland4,0102,551405003,9030010,869
EdinburghSighthill / Gorgie19,665Edinburgh West;
Livingston and Edinburgh Pentland
3,5765,826443006,1750016,020
 Total66,481 16,47813,2142,1250017,5760049,393

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

Old seat: Edinburgh West

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

Old seat: Edinburgh WestTransfer-adjusted Results
DistrictWardElectorate
2017
New SeatCON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
EdinburghAlmond20,037Edinburgh West3,9341,3924,757004,53806814,689
EdinburghCity Centre1,191Edinburgh North and Leith2121743420026703998
EdinburghCorstorphine / Murrayfield16,751Edinburgh West3,0981,5604,800003,4890912,956
EdinburghDrum Brae / Gyle17,205Edinburgh West2,2852,2934,569003,69103312,871
EdinburghForth2,969Edinburgh North and Leith456775949008270113,018
EdinburghInverleith5,295Edinburgh West1,0456801,424001,060034,212
EdinburghPentland Hills1,725Livingston and Edinburgh Pentland25118535300303031,095
EdinburghSighthill / Gorgie3,286Edinburgh West27881691400946022,956
 Total68,459 11,5597,87518,1080015,121013252,795

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

New seat: Edinburgh North and Leith

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

New seat: Edinburgh North and Leith
DistrictWardElectorate
2017
Old Seat CON
Votes
LAB
Votes
LIB
Votes
UKIP
Votes
Green
Votes
SNP
Votes
MIN
Votes
OTH
Votes
Total
Votes
EdinburghCity Centre3,304Edinburgh East61359210900869002,183
EdinburghCity Centre7,494Edinburgh North and Leith1,7951,38127502081,674005,333
EdinburghCity Centre1,046Edinburgh South West256171450025500727
EdinburghCity Centre1,352Edinburgh West2121743420026703998
EdinburghForth20,987Edinburgh North and Leith3,9395,23147903504,9350014,934
EdinburghForth4,087Edinburgh West456775949008270113,018
EdinburghInverleith12,125Edinburgh North and Leith3,2112,09150102712,554008,628
EdinburghLeith13,166Edinburgh North and Leith2,0632,70750202873,810009,369
EdinburghLeith Walk19,436Edinburgh North and Leith2,7305,12456504684,9430013,830
 Total82,997 15,27518,2463,76701,58420,13401459,020

And these are the implied results for 2017 for the new seat of Edinburgh North and Leith. 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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