| Incumbent | Historic Results | Notes | |
|---|---|---|---|
| Derbyshire North East | Lee Rowley (Con) | Con/Lab Marginal | Shelley |
| Sheffield Heeley | Louise Haigh (Lab) | Strong Lab | Sanch/Mat |
| Chesterfield | Toby Perkins (Lab) | Strong Lab | The parent constituency |
| Sheffield Hallam | Jared O Mara (Ind) | Lib/Lab Marginal | Former Lib Dem leader Nick Clegg's old seat, current seat of disgraced MP Jared O'Mara who was sacked by Labour |
| Stockton South | Paul Williams (Lab) | Con/Lab Marginal | Lib Dem candidate has endorsed the Labour candidate in order to defeat the Conservatives |
| Incumbent | Historic Results | Notes | |
|---|---|---|---|
| Uxbridge & Ruislip South | Boris Johnson (Con) | Strong Con | |
| Islington North | Jeremy Corbyn (Lab) | Strong Lab | |
| Dunbartonshire East | Jo Swinson (Lib) | Strong Lib to Lib/SNP Marginal | |
| Ross, Skye & Lochaber | Ian Blackford (SNP) | Strong SNP | |
| Brighton Pavilion | Caroline Lucas (Green) | Strong Green | |
| Dwyfor Meirionnydd | Liz Saville Roberts (PC) | Strong PC | |
| Belfast North | Nigel Dodds (DUP) | SF/DUP Marginal | SDLP and Greens withdrew their candidates to help Sinn Féin defeat the DUP |