European Parliament: Opinium
| End Date | Company | Client | UKIP | LAB | CON | LD | GRN | BRX | CHUK | SNP | Lead |
| 16 May 2019 | Opinium Online | Observer | 2 | 20 | 12 | 15 | 6 | 31 | 4 | 4 | +11 |
| 10 May 2019 | Opinium Online | Observer | 4 | 21 | 11 | 12 | 8 | 34 | 3 | 4 | +13 |
| 07 May 2019 | Opinium Online | People's Vote | 4 | 26 | 14 | 12 | 6 | 29 | 2 | 5 | +3 |
| 25 Apr 2019 | Opinium Online | Observer | 3 | 28 | 14 | 7 | 6 | 28 | 7 | 4 | Tie |
| 12 Apr 2019 | Opinium Online | Observer | 13 | 29 | 17 | 10 | 6 | 12 | 4 | 6 | +12 |
| 30 Mar 2019 | Opinium Online | Observer | 18 | 30 | 24 | 10 | 8 | 4 | +6 | ||
| 15 Mar 2019 | Opinium Online | Observer | 17 | 29 | 28 | 11 | 6 | 4 | +1 |