Westminster Voting Intention: GfK
| End Date | Company | Client | CON | LAB | LD | GRN | UKIP | Lead |
| 14 May 2017 | GfK Online | Business Insider | 48 | 28 | 7 | 3 | 5 | +20 |
| 15 Mar 2017 | GfK Online | 41 | 28 | 7 | 6 | 12 | +13 |
| End Date | Company | Client | CON | LAB | LD | GRN | UKIP | Lead |
| 14 May 2017 | GfK Online | Business Insider | 48 | 28 | 7 | 3 | 5 | +20 |
| 15 Mar 2017 | GfK Online | 41 | 28 | 7 | 6 | 12 | +13 |