# List of marginal seats before the 2017 United Kingdom general election

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 seats :
| Rank | Constituency | Winning party 2015 | Swing required | Winning party 2017 |
| 1 | City of Chester | Labour | 0.09% | Labour |
| 2 | Ealing Central & Acton | Labour | 0.27% | Labour |
| 3 | Berwickshire, Roxburgh and Selkirk | SNP | 0.30% | Conservative |
| 4 | Brentford and Isleworth | Labour | 0.41% | Labour |
| 5 | Halifax | Labour | 0.49% | Labour |
| 6 | Wirral West | Labour | 0.50% | Labour |
| 7 | Ilford North | Labour | 0.60% | Labour |
| 8 | Newcastle-under-Lyme | Labour | 0.76% | Labour |
| 9 | Barrow and Furness | Labour | 0.92% | Labour |
| 10 | Wolverhampton South West | Labour | 1.00% | Labour |
| 11 | Hampstead and Kilburn | Labour | 1.05% | Labour |
| 12 | Enfield North | Labour | 1.18% | Labour |
| 13 | Hove | Labour | 1.18% | Labour |
| 14 | Dewsbury | Labour | 1.35% | Labour |
| 15 | Southport | Liberal Democrats | 1.50% | Conservative |
| 16 | Lancaster and Fleetwood | Labour | 1.50% | Labour |
| 17 | Carshalton and Wallington | Liberal Democrats | 1.52% | Liberal Democrats |
| 18 | North East Derbyshire | Labour | 1.96% | Conservative |
| 19 | Richmond Park | Liberal Democrats | 2.25% | Conservative |
| 20 | Harrow West | Labour | 2.37% | Labour |
| 21 | Bridgend | Labour | 2.44% | Labour |
| 22 | Middlesbrough South and Cleveland East | Labour | 2.48% | Conservative |
| 23 | Westminster North | Labour | 2.50% | Labour |
| 24 | Walsall North | Labour | 2.63% | Conservative |
| 25 | Wrexham | Labour | 2.80% | Labour |
| 26 | Birmingham Northfield | Labour | 2.95% | Labour |
| 27 | Wakefield | Labour | 3.04% | Labour |

### Labour

Labour target seats :
| Rank | Constituency | Winning party 2015 | Swing required | Winning party 2017 |
| 1 | Gower | Conservative | 0.03% | Labour |
| 2 | Derby North | Conservative | 0.05% | Labour |
| 3 | Croydon Central | Conservative | 0.16% | Labour |
| 4 | Vale of Clwyd | Conservative | 0.34% | Labour |
| 5 | Bury North | Conservative | 0.42% | Labour |
| 6 | Morley and Outwood | Conservative | 0.44% | Conservative |
| 7 | Thurrock | Conservative | 0.54% | Conservative |
| 8 | Plymouth Sutton and Devonport | Conservative | 0.55% | Labour |
| 9 | Brighton Kemptown | Conservative | 0.76% | Labour |
| 10 | Bolton West | Conservative | 0.82% | Conservative |
| 11 | Weaver Vale | Conservative | 0.86% | Labour |
| 12 | Telford | Conservative | 0.90% | Conservative |
| 13 | Bedford | Conservative | 1.19% | Labour |
| 14 | Plymouth Moor View | Conservative | 1.20% | Conservative |
| 15 | Lincoln | Conservative | 1.54% | Labour |
| 16 | Peterborough | Conservative | 2.04% | Labour |
| 17 | Cardiff North | Conservative | 2.09% | Labour |
| 18 | Sheffield Hallam | Liberal Democrats | 2.12% | Labour |
| 19 | Corby | Conservative | 2.15% | Conservative |
| 20 | Waveney | Conservative | 2.31% | Conservative |
| 21 | Warrington South | Conservative | 2.32% | Labour |
| 22 | Southampton Itchen | Conservative | 2.59% | Conservative |
| 23 | Keighley | Conservative | 3.11% | Labour |
| 24 | Warwickshire North | Conservative | 3.14% | Conservative |
| 25 | Carlisle | Conservative | 3.26% | Conservative |
| 26 | Renfrewshire East | SNP | 3.28% | Conservative |
| 27 | Leeds North West | Liberal Democrats | 3.35% | Labour |

### Liberal Democrats

Liberal Democrat target seats :
| Rank | Constituency | Winning party 2015 | Swing required | Winning party 2017 |
| 1 | Cambridge | Labour | 0.58% | Labour |
| 2 | Eastbourne | Conservative | 0.69% | Liberal Democrats |
| 3 | Lewes | Conservative | 1.07% | Conservative |
| 4 | Thornbury and Yate | Conservative | 1.54% | Conservative |
| 5 | Twickenham | Conservative | 1.63% | Liberal Democrats |
| 6 | East Dunbartonshire | SNP | 1.97% | Liberal Democrats |
| 7 | Kingston and Surbiton | Conservative | 2.39% | Liberal Democrats |
| 8 | St Ives | Conservative | 2.56% | Conservative |
| 9 | Edinburgh West | SNP | 2.93% | Liberal Democrats |
| 10 | Torbay | Conservative | 3.42% | Conservative |
| 11 | Sutton and Cheam | Conservative | 3.93% | Conservative |
| 12 | Bath | Conservative | 4.06% | Liberal Democrats |
| 13 | Burnley | Labour | 4.08% | Labour |
| 14 | Bermondsey and Old Southwark | Labour | 4.36% | Labour |
| 15 | Yeovil | Conservative | 4.67% | Conservative |
| 16 | North East Fife | SNP | 4.80% | SNP |
| 17 | Caithness, Sutherland and Easter Ross | SNP | 5.62% | Liberal Democrats |
| 18 | Colchester | Conservative | 5.74% | Conservative |
| 19 | Cheltenham | Conservative | 6.06% | Conservative |
| 20 | Cheadle | Conservative | 6.08% | Conservative |
| 21 | Berwick-upon-Tweed | Conservative | 6.08% | Conservative |
| 22 | Ross, Skye and Lochaber | SNP | 6.13% | SNP |
| 23 | Portsmouth South | Conservative | 6.25% | Labour |
| 24 | Brecon and Radnorshire | Conservative | 6.37% | Conservative |
| 25 | Cardiff Central | Labour | 6.37% | Labour |
| 26 | Devon North | Conservative | 6.44% | Conservative |
| 27 | Wells | Conservative | 6.66% | Conservative |

### SNP

SNP target seats :
| Rank | Constituency | Winning party 2015 | Swing required | Winning party 2017 |
| 1 | Dumfriesshire, Clydesdale and Tweeddale | Conservative | 0.77% | Conservative |
| 2 | Orkney and Shetland | Liberal Democrats | 1.80% | Liberal Democrats |
| 3 | Edinburgh South | Labour | 2.68% | Labour |

### Green

Green Party target seats :
| Rank | Constituency | Winning party 2015 | Winning party 2015 | Swing required | Winning party 2017 | Winning party 2017 |
| 1 | Bristol West | | Labour | 4.4% | | Labour |

### Plaid Cymru

Plaid Cymru target seats :
| Rank | Constituency | Winning party 2015 | Winning party 2015 | Swing required | Winning party 2017 | Winning party 2017 |
| 1 | Ynys Môn | | Labour | 0.35% | | Labour |

### Sinn Féin

Sinn Féin target seats :
| Rank | Constituency | Winning party 2015 | Winning party 2015 | Swing required | Winning party 2017 | Winning party 2017 |
| 1 | Fermanagh and South Tyrone | | UUP | 0.52% | | Sinn Féin |

### DUP

Sinn Féin target seats :
| Rank | Constituency | Winning party 2015 | Winning party 2015 | Swing required | Winning party 2017 | Winning party 2017 |
| 1 | Belfast South | | SDLP | 1.16% | | DUP |