The 2017 general election was called by Prime Minister Theresa May on 18 April that year, and held 51 days later on 8 June. 'Election Polling' marked the following as each of the parties' key target seats, ones that were held by a low margin and could feasibly be won by a different party than in the 2015 election
List by party Conservative Conservative target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171City of Chester 0.09% 2Ealing Central & Acton 0.27% 3Berwickshire, Roxburgh and Selkirk 0.30% 4Brentford and Isleworth 0.41% 5Halifax 0.49% 6Wirral West 0.50% 7Ilford North 0.60% 8Newcastle-under-Lyme 0.76% 9Barrow and Furness 0.92% 10Wolverhampton South West 1.00% 11Hampstead and Kilburn 1.05% 12Enfield North 1.18% 13Hove 1.18% 14Dewsbury 1.35% 15Southport 1.50% 16Lancaster and Fleetwood 1.50% 17Carshalton and Wallington 1.52% 18North East Derbyshire 1.96% 19Richmond Park 2.25% 20Harrow West 2.37% 21Bridgend 2.44% 22Middlesbrough South and Cleveland East 2.48% 23Westminster North 2.50% 24Walsall North 2.63% 25Wrexham 2.80% 26Birmingham Northfield 2.95% 27Wakefield 3.04%
Labour Labour target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Gower 0.03% 2Derby North 0.05% 3Croydon Central 0.16% 4Vale of Clwyd 0.34% 5Bury North 0.42% 6Morley and Outwood 0.44% 7Thurrock 0.54% 8Plymouth Sutton and Devonport 0.55% 9Brighton Kemptown 0.76% 10Bolton West 0.82% 11Weaver Vale 0.86% 12Telford 0.90% 13Bedford 1.19% 14Plymouth Moor View 1.20% 15Lincoln 1.54% 16Peterborough 2.04% 17Cardiff North 2.09% 18Sheffield Hallam 2.12% 19Corby 2.15% 20Waveney 2.31% 21Warrington South 2.32% 22Southampton Itchen 2.59% 23Keighley 3.11% 24Warwickshire North 3.14% 25Carlisle 3.26% 26Renfrewshire East 3.28% 27Leeds North West 3.35%
Liberal Democrats Liberal Democrat target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Cambridge 0.58% 2Eastbourne 0.69% 3Lewes 1.07% 4Thornbury and Yate 1.54% 5Twickenham 1.63% 6East Dunbartonshire 1.97% 7Kingston and Surbiton 2.39% 8St Ives 2.56% 9Edinburgh West 2.93% 10Torbay 3.42% 11Sutton and Cheam 3.93% 12Bath 4.06% 13Burnley 4.08% 14Bermondsey and Old Southwark 4.36% 15Yeovil 4.67% 16North East Fife 4.80% 17Caithness, Sutherland and Easter Ross 5.62% 18Colchester 5.74% 19Cheltenham 6.06% 20Cheadle 6.08% 21Berwick-upon-Tweed 6.08% 22Ross, Skye and Lochaber 6.13% 23Portsmouth South 6.25% 24Brecon and Radnorshire 6.37% 25Cardiff Central 6.37% 26Devon North 6.44% 27Wells 6.66%
SNP SNP target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Dumfriesshire, Clydesdale and Tweeddale 0.77% 2Orkney and Shetland 1.80% 3Edinburgh South 2.68%
Green Green Party target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Bristol West 4.4%
Plaid Cymru Plaid Cymru target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Ynys Môn 0.35%
Sinn Féin Sinn Féin target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Fermanagh and South Tyrone 0.52%
DUP Sinn Féin target seatsRank ConstituencyWinning party 2015SwingrequiredWinning party 20171Belfast South 1.16%
Notes
References
See also
List of marginal seats before the 2024 United Kingdom general election List of marginal seats before the 2019 United Kingdom general election List of marginal seats before the 2015 United Kingdom general election