The new marginals?

EDIT: Just to note these aren't CURRENT marginals in the sense of notional 2005 results, I'm suggesting that based on current opinion regionally through the UK these are seats that are likely to be too close to call come May 6th so need particular attention. There are also a raft of other seats that if were properly approached tactically could be stopped from going Tory. Hit me up on twitter with your constituency if you want more detail about it from my perspective. ALSO I've added Tory seats that could be won if tactical voting was applied.

I'm just going to get right in to it, here are a list of the probable marginals right now. That's to say that based on the current regional support that we know, these constituencies are around 1% swing away from being won or lost by a Labour or Lib Dem candidate. Obviously the reason I wanted to put this out somewhere is that we need to be clear where the final battlegrounds are going to be.

Note of warning: These do not take in to account local campaigns, either where a local party is performing above or below the regional performance. It also doesn't take in to account the situation in those constituencies which have been made more open to being won by the Lib Dems due to the removal/suspension of Labour PPC's (currently just two seats). Percentages given are the rough majority levels.

Lab/Tory marginals

Seats currently marked to be won by Tories, with Labour in second.

Telford --- 0.01%
High Peak --- 0.13%
Hammersmith --- 0.41%
Keighley --- 0.54%
Wirral South --- 0.61%
Warwick and Leamington --- 0.83%
Vale of Clwyd --- 0.96%
Weaver Vale --- 1.02%
Dorset South --- 1.27%
Swindon South --- 1.39%
Stevenage --- 1.48%
Blackpool North and Cleveleys --- 1.52%
Tynemouth --- 1.72%
Nuneaton --- 1.87%
Rossendale and Darwen --- 1.90%
Elmet and Rothwell --- 1.91%
Bedford --- 1.98%
Ribble South --- 2.18%
Halifax --- 2.43%
Poplar and Limehouse --- 2.51%

Seats currently marked to be Labour wins, with Tories in second

Copeland --- 0.12%
Pudsey --- 0.23%
Gedling --- 0.25%
Newport West --- 0.28%
Warwickshire North --- 0.32%
Tooting --- 0.39%
Leicestershire North West --- 0.49%
Swindon North --- 0.56%
Dewsbury --- 0.61%
Chatham and Aylesford --- 0.90%
Stockton South --- 1.46%
Carlisle --- 1.66%
Ellesmere Port and Neston --- 1.77%
Coventry South --- 1.79%
Waveney --- 1.86%
Bolton West --- 1.95%
Gower --- 1.97%
Bolton North East --- 1.99%
Morecambe and Lunesdale --- 2.08%

Lib/Tory marginals

Seats currently marked to be won by Tories, with Lib Dems in second.

Bradford West --- 0.33%
Somerset North --- 0.63%
Ealing Central and Acton --- 0.63%
Newbury --- 1.31%
Wiltshire North --- 1.65%

Seats currently marked to be won by the Lib Dems, with Tories in second.

Chelmsford --- 0.14%
Pendle --- 0.39%
Ludlow --- 0.65%
Filton and Bradley Stoke --- 1.48%
Haltemprice and Howden --- 1.54%

Lib/Lab marginals

Seats currently marked to be won by Labour, with Lib Dems in second.

Edinburgh North and Leith --- 0.05%
Sunderland Central --- 0.12%
Bishop Auckland --- 0.34%
Leeds North East --- 0.36%
Wakefield --- 0.53%
Penistone and Stocksbridge --- 0.54%
Birmingham Perry Barr --- 1.25%
Nottingham South --- 1.59%
Bermondsey and Old Southwark --- 1.98%
Plymouth Sutton and Devonport --- 2.01%
Luton South --- 2.16%

Seats currently marked to be won by the Lib Dems, with Labour in second.

Huddersfield --- 0.67%
Newcastle upon Tyne Central --- 0.74%
Manchester Gorton --- 1.76%
Aberdeen South --- 1.78%
Hartlepool --- 1.94%
Birmingham Hodge Hill --- 1.99%
Blyth Valley --- 2.10%

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These constituencies only require around 1000 or fewer votes to swing one way or the other, so a concerted effort could make all the difference, and this does mean Lib Dems and Labour following the advice both Compass, the Guardian and Sunny have set out...voting tactically for the strongest result for progressives in Britain.

The current seat count using a less sophisticated method than FiveThirtyEight detailed on this site, a Regional Swing Calculator:

Con: 265
Lab: 246
Lib Dems: 107
Others: 32

If all of the seats above were successfully defended/won then the seat count would look more like this:

Con: 240
Lab: 255
Lib Dems: 123
Others: 32

Hopefully this information will be useful for people. Below are the list of all other seats that are changing hands to Lib Dems, but obviously can't be left to chance. All proviso's about local campaigns remain...

From Tories:

Dorset North --- 3.11%
Eastbourne --- 3.40%
Bournemouth West --- 3.45%
Harborough --- 3.89%
Meon Valley --- 4.47%
Wells --- 5.26%
Dorset West --- 6.37%
Weston-Super-Mare --- 6.77%
Totnes --- 7.43%

From Labour:

Bristol North West --- 2.67%
Birmingham Hall Green --- 3.16%
Colne Valley --- 3.86%
Edinburgh South --- 4.09%
Burnley --- 4.17%
Derby North --- 5.06%
Swansea West --- 5.15%
Liverpool Wavertree --- 6.47%
Newcastle upon Tyne East --- 7.09%
Northampton North --- 8.00%
Oldham East and Saddleworth --- 8.10%
Bradford East --- 8.94%
Sheffield Central --- 9.06%
Newcastle upon Tyne North --- 9.18%
Watford --- 9.70%
Norwich South --- 10.14%
Oxford East --- 11.41%
Blaydon --- 11.90%
Leicester South --- 12.09%
Islington South and Finsbury --- 12.31%
Durham --- 18.08%

Tactical voting

I also now include a list of constituencies I feel could fall easily if tactical voting was co-ordinated, to keep the Tories out. I chose the criteria of the Tories not having an absolute majority (necessary for tactical voting) and, where the third placed party changes 20% of it's votes to the second placed party, that such a 20% shift in votes outweighs the majority the Tories have over the second placed party.

The following projected Tory wins could be stopped if Lib Dems voted tactically for Labour (up to 20% of LDs likely to vote LD instead voting Labour)

Lincoln
Broxtowe
Milton Keynes North
Cleethorpes
Poplar and Limehouse
Northampton South
Westminster North
Brighton Kemptown
Brigg and Goole
Stroud
Eltham
Derbyshire South
Dudley North
Great Yarmouth
Brentford and Isleworth
Loughborough
Sefton Central
Somerset North East
High Peak
Wirral South
Elmet and Rothwell
Weaver Vale
Stevenage
Swindon South
Tynemouth
Rossendale and Darwen
Dorset South
Keighley
Warwick and Leamington
Hammersmith
Blackpool North and Cleveleys
Ribble South
Telford
Vale of Clwyd
Nuneaton
Halifax
Bedford

The following projected Tory wins could be stopped if Labour voted tactically for Lib Dems (up to 20% of Labour likely to vote Labour instead voting LD)

St Albans
Warrington South
Calder Valley
Bradford West
Ealing Central and Acton
Somerset North

Doing this further to winning the close marginal seats detailed at the top (of which some are also included in this tactical voting list), would change the rough seat total to:

Con: 220
Lab: 272
Lib Dems: 126
Others: 32