Thanet North: 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 Thanet 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 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: Thanet South

The main table shows the district council election results for all the wards in the old seat of Thanet South. 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
DoverLittle Stour and Ashstone [2]4,808Thanet SouthThanet South2,3735431,8567091,3493091,0554033,1161,1863821,1394073,116
DoverMiddle Deal and Sholden [2]878Thanet SouthDover2,0052,31982202222569105691952681040569
DoverSandwich5,421Thanet SouthThanet South2,7977866702422,1866145241893,5131,9227326601963,513
ThanetBeacon Road3,268Thanet SouthThanet South8021,03816908451,09417802,1177431,13923022,117
ThanetBradstowe3,323Thanet SouthThanet South1,1184341,104109871338860852,154766385914872,154
ThanetCentral Harbour5,556Thanet SouthThanet South1,4461,92501,3781,0961,45901,0453,6009641,518681,0483,600
ThanetCliffsend and Pegwell3,715Thanet SouthThanet South1,733842001,620787002,4071,42487510152,407
ThanetEastcliff5,324Thanet SouthThanet South1,1601,91803901,1541,90803883,4501,0151,970723913,450
ThanetKingsgate1,680Thanet SouthThanet South44913200841247001,0887392925221,088
ThanetNethercourt3,390Thanet SouthThanet South1,0461,054001,0941,103002,1979621,1626832,197
ThanetNewington3,485Thanet SouthThanet South2841,03002354141,50203432,2593641,524253442,259
ThanetNorthwood4,938Thanet SouthThanet South9582,370009212,279003,2008102,3295733,200
ThanetSir Moses Montefiore3,714Thanet SouthThanet South8291,08738708661,13640402,4067611,18345822,406
ThanetSt Peters5,515Thanet SouthThanet South2,6161,79241001,9411,32930403,5741,7071,43442563,574
ThanetThanet Villages [2]3,009Thanet SouthThanet North1,8331,16301,47080050806421,950703551506441,950
ThanetViking5,616Thanet SouthThanet South3,0001,2221,33401,96580087403,6391,72890699763,639
 Total Thanet South     18,18515,6694,2903,09541,23915,99616,6585,4293,15441,239

The transfer table below shows the votes cast in the old seat of Thanet South 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
CON15,99618,1852,1890Transfer away 12.0% (= 2189 / 18185) of ward's CON votes
LAB16,66015,6690991Transfer in 45.2% (= 991 / 2192) of ward's transfer pool votes
LIB5,4314,29001,141Transfer in 52.1% (= 1141 / 2192) of ward's transfer pool votes
OTH3,1553,095060Transfer in 2.7% (= 60 / 2192) of ward's transfer pool votes
Total41,24241,2392,1922,192 

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

Old seat: Canterbury

The main table shows the district council election results for all the wards in the old seat of Canterbury. 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 CanterburyBarham Downs2,083CanterburyCanterbury3183476103954294601,383370172770701,383
City Of CanterburyBarton5,442CanterburyCanterbury2,3895052,8254631,3972951,6522713,6151,3085511,3444093,615
City Of CanterburyBlean Forest4,211CanterburyCanterbury1,23429803221,86245004862,7981,74452605272,798
City Of CanterburyChartham and Stone Street4,059CanterburyCanterbury1,45246473101,47947374502,6971,385623606812,697
City Of CanterburyChestfield and Swalecliffe6,518CanterburyCanterbury4,5758201,04203,07755270104,3302,8837625701134,330
City Of CanterburyGorrell4,053CanterburyCanterbury1,4661,559321591,1591,233254472,6931,0851,311206892,693
City Of CanterburyHarbledown1,929CanterburyCanterbury264104517038215174901,282357257609571,282
City Of CanterburyHarbour3,805CanterburyCanterbury9401,3793101618521,2492811462,5287981,3172281832,528
City Of CanterburyLittle Stour1,989CanterburyCanterbury454119213076320035801,321714274291401,321
City Of CanterburyMarshside1,951CanterburyThanet North32134800622674001,2965826990131,296
City Of CanterburyNorth Nailbourne2,000CanterburyCanterbury57404470747058201,329699100473541,329
City Of CanterburyNorthgate3,956CanterburyCanterbury9121,14122801,0511,31426302,6289841,388214402,628
City Of CanterburySeasalter5,633CanterburyCanterbury3,6362,18530802,2201,33418803,7422,0801,447153613,742
City Of CanterburySt Stephens5,290CanterburyCanterbury2,5431,0891,5782021,6517071,0251313,5141,5468988342343,514
City Of CanterburySturry North2,027CanterburyCanterbury42630900780566001,3467305970171,346
City Of CanterburySturry South2,212CanterburyCanterbury550928601,11018617401,4701,040252141351,470
City Of CanterburyTankerton3,572CanterburyCanterbury1,6731981,042681,332158829542,3731,2483126741372,373
City Of CanterburyWestgate5,281CanterburyCanterbury1,5891,7282,3303379311,0131,3661983,5088721,2161,1123073,508
City Of CanterburyWincheap5,631CanterburyCanterbury1,0869503,3672137236332,2421423,7406779331,8253033,740
 Total Canterbury     22,53311,23012,3551,47547,59321,11313,64510,0582,77547,593

The transfer table below shows the votes cast in the old seat of Canterbury 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
CON21,11322,5331,4200Transfer away 6.3% (= 1420 / 22533) of ward's CON votes
LAB13,64211,23002,412Transfer in 65.0% (= 2412 / 3710) of ward's transfer pool votes
LIB10,05912,3552,2960Transfer away 18.6% (= 2296 / 12355) of ward's LIB votes
OTH2,7731,47501,298Transfer in 35.0% (= 1298 / 3710) of ward's transfer pool votes
Total47,58747,5933,7103,710 

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

Old seat: Thanet North

The main table shows the district council election results for all the wards in the old seat of Thanet North. 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 CanterburyGreenhill and Eddington4,029Thanet NorthThanet North4126891,356733956611,301702,4274056891,287442,427
City Of CanterburyHerne and Broomfield5,833Thanet NorthThanet North1,8276081,9039771,2084021,2586463,5141,2725811,2454143,514
City Of CanterburyHeron5,920Thanet NorthThanet North1,5909673,02701,0166181,93403,5681,0216321,91403,568
City Of CanterburyReculver6,647Thanet NorthThanet North3,6555872,68302,1143401,55204,0062,1183511,53604,006
City Of CanterburyWest Bay4,688Thanet NorthThanet North1,70899132001,59892729902,8241,59892929502,824
ThanetBirchington North3,238Thanet NorthThanet North1,71437408581,13524805681,9511,18839703641,951
ThanetBirchington South5,159Thanet NorthThanet North3,05386108182,00656605373,1092,05670703443,109
ThanetCliftonville East5,089Thanet NorthThanet South4,3001,511002,269797003,0662,269797003,066
ThanetCliftonville West5,258Thanet NorthThanet South1,4671,6470971,4471,6250963,1681,4561,6500613,168
ThanetDane Valley5,473Thanet NorthThanet North1,0651,576001,3301,968003,2981,3301,968003,298
ThanetGarlinge3,687Thanet NorthThanet North1,285949001,278944002,2221,278944002,222
ThanetMargate Central3,516Thanet NorthThanet North65374301089201,04701522,1199341,0870972,119
ThanetSalmestone3,798Thanet NorthThanet North771807001,1181,170002,2881,1181,170002,288
ThanetThanet Villages [1]1,807Thanet NorthThanet North1,8331,16301,47044728403581,08948037802291,089
ThanetWestbrook3,233Thanet NorthThanet North1,206620001,287661001,9481,287661001,948
ThanetWestgate-on-Sea5,202Thanet NorthThanet North2,5421,45202801,8641,06502053,1341,8831,11901313,134
 Total Thanet North     21,43213,3236,3442,63243,73121,69814,0646,2791,68843,731

The transfer table below shows the votes cast in the old seat of Thanet North 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
CON21,69921,4320267Transfer in 26.5% (= 267 / 1009) of ward's transfer pool votes
LAB14,06513,3230742Transfer in 73.5% (= 742 / 1009) of ward's transfer pool votes
LIB6,2796,344650Transfer away 1.0% (= 65 / 6344) of ward's LIB votes
OTH1,6892,6329430Transfer away 35.8% (= 943 / 2632) of ward's OTH votes
Total43,73243,7311,0091,009 

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

New seat: Thanet North

The new seat of Thanet North 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
ThanetBirchington North3,238Thanet NorthThanet North1,18839703641,951
ThanetBirchington South5,159Thanet NorthThanet North2,05670703443,109
ThanetDane Valley5,473Thanet NorthThanet North1,3301,968003,298
ThanetGarlinge3,687Thanet NorthThanet North1,278944002,222
City Of CanterburyGreenhill and Eddington4,029Thanet NorthThanet North4056891,287442,427
City Of CanterburyHerne and Broomfield5,833Thanet NorthThanet North1,2725811,2454143,514
City Of CanterburyHeron5,920Thanet NorthThanet North1,0216321,91403,568
ThanetMargate Central3,516Thanet NorthThanet North9341,0870972,119
City Of CanterburyMarshside1,951CanterburyThanet North5826990131,296
City Of CanterburyReculver6,647Thanet NorthThanet North2,1183511,53604,006
ThanetSalmestone3,798Thanet NorthThanet North1,1181,170002,288
ThanetThanet Villages [1]1,807Thanet NorthThanet North48037802291,089
ThanetThanet Villages [2]3,009Thanet SouthThanet North703551506441,950
City Of CanterburyWest Bay4,688Thanet NorthThanet North1,59892929502,824
ThanetWestbrook3,233Thanet NorthThanet North1,287661001,948
ThanetWestgate-on-Sea5,202Thanet NorthThanet North1,8831,11901313,134
 Total  Thanet North19,26012,8676,3292,28540,743

And these are the implied results for 2005 for the new seat of Thanet North.