Leeds Central: New Boundaries Calculation

This page shows the detail of the calculations performed to estimate the general election result for 2005 had the new boundaries for Leeds Central 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 2005. 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.

Due to changes in ward boundaries, some new wards are divided among several old constituencies (though never between two new constituencies). Such wards are shown divided into several parts, called [1], [2], and so on.

Election results from a recent local election are given. This is usually the local election from 2003, 2004 or 2006. 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. Where zero votes are shown, the ward is not needed because the entire old seat is unsplit.

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% of its votes from each ward. 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 on a ward-by-ward basis using these common percentages.

More details of the calculation formulas are available.

The old seat(s) needed are:

Old seat: Morley and Rothwell

The main table shows the district council election results for all the wards in the old seat of Morley and Rothwell. The first block shows the actual results, the second block shows the turnout-adjusted results, and the third block has the transfer-adjusted results. Details of the transfer calculation are given below this table.

 Actual ResultsTurnout-adjusted Results Transfer-adjusted Results
DistrictWardElectorate
2005
Old SeatNew Seat CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
City Of LeedsArdsley and Robin Hood15,530Morley and RothwellMorley and Outwood3,8665,3402,4133,6992,2913,1641,4302,1929,0772,4764,2761,2341,0909,077
City Of LeedsCity and Hunslet [2]0Morley and RothwellLeeds Central1,5514,8402,5448660000000000
City Of LeedsGarforth and Swillington [3]0Morley and RothwellElmet and Rothwell7,5288,0803,8791,1000000000000
City Of LeedsKippax and Methley [2]0Morley and RothwellElmet and Rothwell4,24410,4002,3641,6220000000000
City Of LeedsMiddleton Park [2]9,418Morley and RothwellLeeds Central3,1246,3662,2291,1231,3392,7299554815,5041,3923,0488242395,504
City Of LeedsMorley North [2]16,894Morley and RothwellMorley and Outwood2,7133,9131,19111,8731,3601,9625975,9549,8731,7994,5975152,9609,873
City Of LeedsMorley South15,753Morley and RothwellMorley and Outwood1,8265,0411,1808,8259962,7516444,8169,2071,3544,9015552,3949,207
City Of LeedsRothwell [2]15,113Morley and RothwellElmet and Rothwell2,2306,2738,7177951,0933,0764,2743908,8331,2043,7453,6891938,833
 Total Morley and Rothwell     7,07913,6827,90013,83342,4948,22620,5696,8196,87942,494

The transfer table below shows the votes cast in the old seat of Morley and Rothwell at the general election, as well as the total local turnout-adjusted votes. The number of votes to transfer, shown in the fourth and fifth columns, are the difference between the general and local votes. Strong parties will have votes transferred away, and weak parties will have votes transferred into them. The final column describes how votes will be transferred away from or into that party on a ward-by-ward basis. If a party is too strong, it will lose a percentage of its votes in each ward which go into that ward's transfer pool. If a party is too weak, it will gain votes from each ward's transfer pool in proportion to the number of transfer votes it needs over the whole old seat.

PartyGeneral
Election 2005
Votes
Local Election
Turnout-adjusted
Votes
Votes to
transfer
away
Votes to
transfer
into
Ward Transfers needed
CON8,2277,07901,148Transfer in 14.3% (= 1148 / 8036) of ward's transfer pool votes
LAB20,57013,68206,888Transfer in 85.7% (= 6888 / 8036) of ward's transfer pool votes
LIB6,8197,9001,0810Transfer away 13.7% (= 1081 / 7900) of ward's LIB votes
OTH6,87913,8336,9540Transfer away 50.3% (= 6954 / 13833) of ward's OTH votes
Total42,49542,4948,0368,036 

After transfer adjustment, the totals for each party over all the wards match the general election vote in the old seat.

Old seat: Leeds East

The main table shows the district council election results for all the wards in the old seat of Leeds East. The first block shows the actual results, the second block shows the turnout-adjusted results, and the third block has the transfer-adjusted results. Details of the transfer calculation are given below this table.

 Actual ResultsTurnout-adjusted Results Transfer-adjusted Results
DistrictWardElectorate
2005
Old SeatNew Seat CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
City Of LeedsBurmantofts and Richmond Hill [2]6,430Leeds EastLeeds Central7183,6907,0111,7881919811,8644753,5111821,8671,3381223,511
City Of LeedsChapel Allerton [2]362Leeds EastLeeds North East2,0466,8344,3873,51324815241198221273710198
City Of LeedsCross Gates and Whinmoor [2]6,648Leeds EastLeeds East6,4408,4081,0371,3431,3571,7722192833,6311,2972,103157733,631
City Of LeedsGarforth and Swillington [2]42Leeds EastElmet and Rothwell7,5288,0803,8791,1008941227112022
City Of LeedsGipton and Harehills [2]13,752Leeds EastLeeds East8758,4389,0495593473,3503,5922227,5113314,5422,579577,511
City Of LeedsKillingbeck and Seacroft16,181Leeds EastLeeds East2,2848,6503,1371,0791,3325,0461,8306298,8371,2736,0861,3131628,837
City Of LeedsTemple Newsam [2]11,649Leeds EastLeeds East7,6637,2713,3088462,5542,4241,1032826,3632,4413,056791726,363
 Total Leeds East     5,81313,6638,6641,93330,0735,55717,7956,22050030,073

The transfer table below shows the votes cast in the old seat of Leeds East at the general election, as well as the total local turnout-adjusted votes. The number of votes to transfer, shown in the fourth and fifth columns, are the difference between the general and local votes. Strong parties will have votes transferred away, and weak parties will have votes transferred into them. The final column describes how votes will be transferred away from or into that party on a ward-by-ward basis. If a party is too strong, it will lose a percentage of its votes in each ward which go into that ward's transfer pool. If a party is too weak, it will gain votes from each ward's transfer pool in proportion to the number of transfer votes it needs over the whole old seat.

PartyGeneral
Election 2005
Votes
Local Election
Turnout-adjusted
Votes
Votes to
transfer
away
Votes to
transfer
into
Ward Transfers needed
CON5,5575,8132560Transfer away 4.4% (= 256 / 5813) of ward's CON votes
LAB17,79913,66304,136Transfer in 100.0% (= 4136 / 4136) of ward's transfer pool votes
LIB6,2218,6642,4430Transfer away 28.2% (= 2443 / 8664) of ward's LIB votes
OTH5001,9331,4330Transfer away 74.1% (= 1433 / 1933) of ward's OTH votes
Total30,07730,0734,1364,136 

After transfer adjustment, the totals for each party over all the wards match the general election vote in the old seat.

Old seat: Leeds Central

The main table shows the district council election results for all the wards in the old seat of Leeds Central. The first block shows the actual results, the second block shows the turnout-adjusted results, and the third block has the transfer-adjusted results. Details of the transfer calculation are given below this table.

 Actual ResultsTurnout-adjusted Results Transfer-adjusted Results
DistrictWardElectorate
2005
Old SeatNew Seat CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
City Of LeedsArmley [1]1,378Leeds CentralLeeds West2,6767,2952,0863,56010929785145636844075489636
City Of LeedsBeeston and Holbeck15,633Leeds CentralLeeds Central3,1316,3882,6782,7931,5083,0771,2901,3457,2201,1714,3908298287,220
City Of LeedsBurmantofts and Richmond Hill [1]8,402Leeds CentralLeeds Central7183,6907,0111,7882111,0842,0605253,8801632,0681,3233233,880
City Of LeedsChapel Allerton [1]659Leeds CentralLeeds North East2,0466,8344,3873,513371248064305281855139305
City Of LeedsCity and Hunslet [1]13,684Leeds CentralLeeds Central1,5514,8402,5448661,0003,1211,6405586,3197774,1441,0533436,319
City Of LeedsFarnley and Wortley [1]742Leeds CentralLeeds West2,2094,26196611,2574078182063423117211126342
City Of LeedsGipton and Harehills [1]1,302Leeds CentralLeeds East8758,4389,04955928268288186022138418511602
City Of LeedsHyde Park and Woodhouse [1]10,251Leeds CentralLeeds Central1,1113,4365,4505205001,5472,4532344,7343882,6241,5761444,734
City Of LeedsMiddleton Park [1]7,198Leeds CentralLeeds Central3,1246,3662,2291,1238091,6485772913,3256282,1463701793,325
City Of LeedsMorley North [1]0Leeds CentralMorley and Outwood2,7133,9131,19111,8730000000000
City Of LeedsRothwell [1]0Leeds CentralElmet and Rothwell2,2306,2738,7177950000000000
City Of LeedsTemple Newsam [1]3,948Leeds CentralLeeds East7,6637,2713,308846732695316811,8245681,002203491,824
 Total Leeds Central     4,97411,9398,8073,46729,1873,86417,5275,6602,13529,187

The transfer table below shows the votes cast in the old seat of Leeds Central at the general election, as well as the total local turnout-adjusted votes. The number of votes to transfer, shown in the fourth and fifth columns, are the difference between the general and local votes. Strong parties will have votes transferred away, and weak parties will have votes transferred into them. The final column describes how votes will be transferred away from or into that party on a ward-by-ward basis. If a party is too strong, it will lose a percentage of its votes in each ward which go into that ward's transfer pool. If a party is too weak, it will gain votes from each ward's transfer pool in proportion to the number of transfer votes it needs over the whole old seat.

PartyGeneral
Election 2005
Votes
Local Election
Turnout-adjusted
Votes
Votes to
transfer
away
Votes to
transfer
into
Ward Transfers needed
CON3,8654,9741,1090Transfer away 22.3% (= 1109 / 4974) of ward's CON votes
LAB17,52611,93905,587Transfer in 100.0% (= 5587 / 5587) of ward's transfer pool votes
LIB5,6608,8073,1470Transfer away 35.7% (= 3147 / 8807) of ward's LIB votes
OTH2,1353,4671,3320Transfer away 38.4% (= 1332 / 3467) of ward's OTH votes
Total29,18629,1875,5875,587 

After transfer adjustment, the totals for each party over all the wards match the general election vote in the old seat.

Old seat: Leeds West

The main table shows the district council election results for all the wards in the old seat of Leeds West. The first block shows the actual results, the second block shows the turnout-adjusted results, and the third block has the transfer-adjusted results. Details of the transfer calculation are given below this table.

 Actual ResultsTurnout-adjusted Results Transfer-adjusted Results
DistrictWardElectorate
2005
Old SeatNew Seat CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
City Of LeedsArmley [2]15,439Leeds WestLeeds West2,6767,2952,0863,5601,4103,8451,1001,8768,2311,4034,9869468938,231
City Of LeedsBramley and Stanningley [1]15,347Leeds WestLeeds West2,5346,8984,8311,4331,3213,5962,5187478,1821,3154,3442,1663558,182
City Of LeedsCalverley and Farsley [1]0Leeds WestPudsey12,3554,3883,7619930000000000
City Of LeedsFarnley and Wortley [2]16,491Leeds WestLeeds West2,2094,26196611,2571,0392,0044545,2958,7921,0344,8443902,5228,792
City Of LeedsHyde Park and Woodhouse [3]1,314Leeds WestLeeds Central1,1113,4365,45052074229363357017329831216701
City Of LeedsKirkstall [2]14,546Leeds WestLeeds West2,0316,9175,0672,3159653,2852,4061,0997,7559604,2002,0705237,755
City Of LeedsPudsey [1]104Leeds WestPudsey6,7539,4093,0709111926835618286156
 Total Leeds West     4,82812,9856,8499,05533,7174,80618,7025,8944,31333,717

The transfer table below shows the votes cast in the old seat of Leeds West at the general election, as well as the total local turnout-adjusted votes. The number of votes to transfer, shown in the fourth and fifth columns, are the difference between the general and local votes. Strong parties will have votes transferred away, and weak parties will have votes transferred into them. The final column describes how votes will be transferred away from or into that party on a ward-by-ward basis. If a party is too strong, it will lose a percentage of its votes in each ward which go into that ward's transfer pool. If a party is too weak, it will gain votes from each ward's transfer pool in proportion to the number of transfer votes it needs over the whole old seat.

PartyGeneral
Election 2005
Votes
Local Election
Turnout-adjusted
Votes
Votes to
transfer
away
Votes to
transfer
into
Ward Transfers needed
CON4,8074,828210Transfer away 0.4% (= 21 / 4828) of ward's CON votes
LAB18,70412,98505,719Transfer in 100.0% (= 5719 / 5719) of ward's transfer pool votes
LIB5,8946,8499550Transfer away 13.9% (= 955 / 6849) of ward's LIB votes
OTH4,3139,0554,7420Transfer away 52.4% (= 4742 / 9055) of ward's OTH votes
Total33,71833,7175,7195,719 

After transfer adjustment, the totals for each party over all the wards match the general election vote in the old seat.

Old seat: Leeds North West

The main table shows the district council election results for all the wards in the old seat of Leeds North West. The first block shows the actual results, the second block shows the turnout-adjusted results, and the third block has the transfer-adjusted results. Details of the transfer calculation are given below this table.

 Actual ResultsTurnout-adjusted Results Transfer-adjusted Results
DistrictWardElectorate
2005
Old SeatNew Seat CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
City Of LeedsAdel and Wharfedale16,015Leeds North WestLeeds North West14,1033,7465,8445685,7911,5382,4002339,9624,7902,8002,2541179,962
City Of LeedsAlwoodley [2]0Leeds North WestLeeds North East12,2384,3148,2897010000000000
City Of LeedsChapel Allerton [4]885Leeds North WestLeeds North East2,0466,8344,3873,513672241441155505530113558550
City Of LeedsGuiseley and Rawdon [1]1,726Leeds North WestPudsey10,5715,5063,9781,641523272197811,073432414185401,073
City Of LeedsHeadingley15,953Leeds North WestLeeds North West1,1871,9825,3951,1821,2092,0185,4931,2049,9241,0003,1575,1596079,924
City Of LeedsHorsforth [1]205Leeds North WestPudsey7,0403,13010,7611,878391760101263232565126
City Of LeedsHyde Park and Woodhouse [2]3,374Leeds North WestLeeds Central1,1113,4365,4505202226861,0881042,1001838421,021522,100
City Of LeedsKirkstall [1]1,528Leeds North WestLeeds West2,0316,9175,0672,3151184032951359519750827768951
City Of LeedsMoortown [2]3,274Leeds North WestLeeds North East5,9074,83010,524542552451983512,037456631923252,037
City Of LeedsOtley and Yeadon [1]12,304Leeds North WestLeeds North West7,1374,0529,6753,7992,2151,2573,0021,1797,6531,8322,4062,8195957,653
City Of LeedsWeetwood16,614Leeds North WestLeeds North West6,0074,8547,6051,0603,1792,5694,02556110,3342,6293,6403,78028310,334
 Total Leeds North West     13,9159,43517,6873,67344,71011,51014,73416,6121,85444,710

The transfer table below shows the votes cast in the old seat of Leeds North West at the general election, as well as the total local turnout-adjusted votes. The number of votes to transfer, shown in the fourth and fifth columns, are the difference between the general and local votes. Strong parties will have votes transferred away, and weak parties will have votes transferred into them. The final column describes how votes will be transferred away from or into that party on a ward-by-ward basis. If a party is too strong, it will lose a percentage of its votes in each ward which go into that ward's transfer pool. If a party is too weak, it will gain votes from each ward's transfer pool in proportion to the number of transfer votes it needs over the whole old seat.

PartyGeneral
Election 2005
Votes
Local Election
Turnout-adjusted
Votes
Votes to
transfer
away
Votes to
transfer
into
Ward Transfers needed
CON11,51013,9152,4050Transfer away 17.3% (= 2405 / 13915) of ward's CON votes
LAB14,7359,43505,300Transfer in 100.0% (= 5300 / 5300) of ward's transfer pool votes
LIB16,61217,6871,0750Transfer away 6.1% (= 1075 / 17687) of ward's LIB votes
OTH1,8543,6731,8190Transfer away 49.5% (= 1819 / 3673) of ward's OTH votes
Total44,71144,7105,3005,300 

After transfer adjustment, the totals for each party over all the wards match the general election vote in the old seat.

New seat: Leeds Central

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

DistrictWardElectorate
2005
Old SeatNew Seat CON
Votes
LAB
Votes
LIB
Votes
OTH
Votes
Total
Votes
City Of LeedsBeeston and Holbeck15,633Leeds CentralLeeds Central1,1714,3908298287,220
City Of LeedsBurmantofts and Richmond Hill [1]8,402Leeds CentralLeeds Central1632,0681,3233233,880
City Of LeedsBurmantofts and Richmond Hill [2]6,430Leeds EastLeeds Central1821,8671,3381223,511
City Of LeedsCity and Hunslet [1]13,684Leeds CentralLeeds Central7774,1441,0533436,319
City Of LeedsCity and Hunslet [2]0Morley and RothwellLeeds Central00000
City Of LeedsHyde Park and Woodhouse [1]10,251Leeds CentralLeeds Central3882,6241,5761444,734
City Of LeedsHyde Park and Woodhouse [2]3,374Leeds North WestLeeds Central1838421,021522,100
City Of LeedsHyde Park and Woodhouse [3]1,314Leeds WestLeeds Central7329831216701
City Of LeedsMiddleton Park [1]7,198Leeds CentralLeeds Central6282,1463701793,325
City Of LeedsMiddleton Park [2]9,418Morley and RothwellLeeds Central1,3923,0488242395,504
 Total  Leeds Central4,96221,4318,6512,24937,294

And these are the implied results for 2005 for the new seat of Leeds Central.