Best Prime Minister: Savanta ComRes
| End Date | Company | Client | CON | LAB | OTH | DK | Lead |
| 18 Apr 2021 | Savanta ComRes Online | 44 | 30 | 26 | +14 | ||
| 14 Mar 2021 | Savanta ComRes Online | 44 | 27 | 29 | +15 | ||
| 14 Feb 2021 | Savanta ComRes Online | 43 | 27 | 30 | +13 | ||
| 17 Jan 2021 | Savanta ComRes Online | 38 | 31 | 32 | +6 | ||
| 13 Dec 2020 | Savanta ComRes Online | 39 | 31 | 30 | +8 | ||
| 15 Nov 2020 | Savanta ComRes Online | 41 | 31 | 28 | +10 | ||
| 18 Oct 2020 | Savanta ComRes Online | 40 | 31 | 29 | +9 | ||
| 20 Sep 2020 | Savanta ComRes Online | 41 | 35 | 24 | +6 | ||
| 16 Aug 2020 | Savanta ComRes Online | 43 | 30 | 27 | +13 | ||
| 19 Jul 2020 | Savanta ComRes Online | 40 | 31 | 29 | +9 | ||
| 14 Jun 2020 | Savanta ComRes Online | 46 | 26 | 28 | +18 | ||
| 25 Jul 2019 | Savanta ComRes Online | 49 | 28 | 24 | +21 |