| Opinium | 2020-09-25 | | 42 | 39 | 6 | 5 | 4 | 1 |
| DeltaPoll | 2020-09-25 | | 38 | 42 | 5 | 6 | 5 | 0 |
| Yougov | 2020-09-24 | | 38 | 42 | 4 | 6 | 5 | 1 |
| Redfield and Wilton Strategies | 2020-09-23 | | 40 | 40 | 4 | 7 | 5 | 0 |
| Kantar | 2020-09-21 | | 38 | 40 | 4 | 9 | 4 | 1 |
| Yougov | 2020-09-17 | | 40 | 40 | 4 | 6 | 5 | 1 |
| Survation | 2020-09-16 | | 38 | 40 | 5 | 7 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-09-15 | | 39 | 41 | 5 | 8 | 5 | 0 |
| Opinium | 2020-09-11 | | 40 | 42 | 5 | 6 | 4 | 1 |
| Survation | 2020-09-04 | | 38 | 40 | 5 | 8 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-09-02 | | 37 | 43 | 4 | 8 | 4 | 0 |
| Opinium | 2020-08-28 | | 40 | 40 | 6 | 6 | 3 | 0 |
| Yougov | 2020-08-25 | | 36 | 43 | 6 | 6 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-08-24 | | 37 | 42 | 4 | 9 | 5 | 0 |
| Survation | 2020-08-21 | | 37 | 41 | 5 | 9 | 4 | 0 |
| Yougov | 2020-08-19 | | 38 | 40 | 5 | 6 | 6 | 1 |
| Redfield and Wilton Strategies | 2020-08-19 | | 37 | 44 | 4 | 7 | 4 | 0 |
| SavantaComRes | 2020-08-16 | | 37 | 42 | 4 | 7 | 3 | 1 |
| Opinium | 2020-08-14 | | 39 | 42 | 5 | 5 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-08-12 | | 36 | 43 | 4 | 9 | 4 | 0 |
| Yougov | 2020-08-12 | | 35 | 44 | 6 | 5 | 5 | 1 |
| Yougov | 2020-08-05 | | 36 | 42 | 5 | 8 | 5 | 1 |
| Ipsos Mori | 2020-08-04 | | 37 | 45 | 5 | 6 | 5 | 1 |
| Survation | 2020-08-03 | | 35 | 44 | 4 | 8 | 5 | 0 |
| Opinium | 2020-07-31 | | 38 | 41 | 6 | 6 | 4 | 1 |
| Yougov | 2020-07-31 | | 35 | 43 | 5 | 6 | 5 | 1 |
| Redfield and Wilton Strategies | 2020-07-29 | | 38 | 43 | 4 | 7 | 4 | 0 |
| Opinium | 2020-07-24 | | 38 | 42 | 5 | 6 | 5 | 1 |
| Redfield and Wilton Strategies | 2020-07-22 | | 36 | 44 | 4 | 8 | 5 | 1 |
| SavantaComRes | 2020-07-19 | | 37 | 43 | 5 | 6 | 2 | 1 |
| Opinium | 2020-07-17 | | 36 | 44 | 6 | 6 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-07-15 | | 37 | 44 | 4 | 8 | 4 | 0 |
| Kantar | 2020-07-13 | | 35 | 45 | 5 | 9 | 2 | 1 |
| Survation | 2020-07-12 | | 36 | 42 | 4 | 8 | 5 | 0 |
| Opinium | 2020-07-10 | | 38 | 42 | 6 | 6 | 4 | 1 |
| Yougov | 2020-07-09 | | 36 | 46 | 5 | 6 | 3 | 0 |
| Redfield and Wilton Strategies | 2020-07-08 | | 39 | 44 | 4 | 7 | 4 | 0 |
| Survation | 2020-07-06 | | 37 | 44 | 4 | 7 | 4 | 0 |
| Opinium | 2020-07-03 | | 37 | 41 | 5 | 8 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-07-01 | | 38 | 42 | 4 | 8 | 5 | 0 |
| Opinium | 2020-06-26 | | 39 | 43 | 5 | 6 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-06-25 | | 38 | 44 | 4 | 7 | 4 | 0 |
| Survation | 2020-06-25 | | 36 | 43 | 5 | 8 | 4 | 0 |
| Opinium | 2020-06-19 | | 40 | 44 | 5 | 5 | 3 | 1 |
| Redfield and Wilton Strategies | 2020-06-18 | | 38 | 43 | 4 | 8 | 4 | 0 |
| Kantar | 2020-06-15 | | 35 | 43 | 5 | 8 | 4 | 0 |
| SavantaComRes | 2020-06-14 | | 36 | 40 | 5 | 9 | 3 | 1 |
| Opinium | 2020-06-12 | | 39 | 44 | 5 | 6 | 2 | 0 |
| Yougov | 2020-06-12 | | 37 | 45 | 5 | 6 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-06-11 | | 39 | 41 | 5 | 9 | 4 | 0 |
| Survation | 2020-06-10 | | 36 | 42 | 5 | 8 | 4 | 0 |
| Ipsos Mori | 2020-06-10 | | 38 | 43 | 4 | 10 | 3 | 1 |
| Opinium | 2020-06-05 | | 40 | 43 | 5 | 6 | 3 | 0 |
| DeltaPoll | 2020-06-05 | | 38 | 41 | 2 | 8 | 4 | 0 |
| Redfield and Wilton Strategies | 2020-06-03 | | 36 | 43 | 4 | 9 | 5 | 1 |
| Survation | 2020-06-03 | | 39 | 41 | 4 | 7 | 4 | 1 |
| Yougov | 2020-05-30 | | 35 | 45 | 5 | 6 | 5 | 0 |
| Opinium | 2020-05-29 | | 39 | 43 | 5 | 6 | 3 | 1 |
| DeltaPoll | 2020-05-28 | | 38 | 43 | 3 | 8 | 4 | 0 |
| Redfield and Wilton Strategies | 2020-05-27 | | 37 | 43 | 5 | 9 | 3 | 0 |
| Yougov | 2020-05-27 | | 38 | 43 | 5 | 6 | 4 | 1 |
| Survation | 2020-05-26 | | 33 | 46 | 5 | 8 | 4 | 0 |
| Yougov | 2020-05-26 | | 38 | 44 | 5 | 6 | 4 | 1 |
| Opinium | 2020-05-22 | | 35 | 47 | 5 | 6 | 3 | 0 |
| Yougov | 2020-05-19 | | 33 | 48 | 5 | 6 | 5 | 1 |
| SavantaComRes | 2020-05-17 | | 33 | 46 | 4 | 7 | 4 | 0 |
| Redfield and Wilton Strategies | 2020-05-15 | | 35 | 47 | 4 | 9 | 3 | 0 |
| Opinium | 2020-05-14 | | 34 | 49 | 5 | 6 | 3 | 1 |
| Opinium | 2020-05-13 | | 34 | 49 | 5 | 6 | 3 | 1 |
| Kantar | 2020-05-11 | | 32 | 51 | 5 | 7 | 2 | 1 |
| Opinium | 2020-05-07 | | 33 | 49 | 5 | 6 | 5 | 1 |
| Redfield and Wilton Strategies | 2020-05-06 | | 31 | 50 | 4 | 7 | 5 | 0 |
| Yougov | 2020-05-06 | | 30 | 50 | 4 | 7 | 5 | 1 |
| Opinium | 2020-05-01 | | 33 | 51 | 5 | 6 | 3 | 1 |
| Survation | 2020-04-28 | | 31 | 48 | 4 | 8 | 5 | 1 |
| Redfield and Wilton Strategies | 2020-04-26 | | 33 | 50 | 5 | 7 | 4 | 0 |
| Opinium | 2020-04-23 | | 33 | 50 | 5 | 7 | 3 | 0 |
| Kantar | 2020-04-20 | | 28 | 54 | 4 | 9 | 4 | 1 |
| Opinium | 2020-04-17 | | 32 | 51 | 5 | 6 | 3 | 0 |
| Redfield and Wilton Strategies | 2020-04-17 | | 31 | 52 | 4 | 8 | 3 | 1 |
| Yougov | 2020-04-17 | | 32 | 53 | 4 | 5 | 3 | 1 |
| Opinium | 2020-04-09 | | 29 | 55 | 5 | 5 | 4 | 0 |
| BMG Research | 2020-04-09 | | 29 | 46 | 3 | 10 | 6 | 1 |
| Opinium | 2020-04-03 | | 30 | 53 | 5 | 7 | 3 | 1 |
| Yougov | 2020-04-02 | | 28 | 52 | 5 | 8 | 5 | 1 |
| Redfield and Wilton Strategies | 2020-04-02 | | 29 | 49 | 4 | 8 | 4 | 1 |
| Opinium | 2020-03-27 | | 28 | 54 | 5 | 6 | 3 | 1 |
| Number Cruncher Politics | 2020-03-26 | | 28 | 54 | 4 | 7 | 4 | 0 |
| Redfield and Wilton Strategies | 2020-03-23 | | 29 | 47 | 5 | 8 | 5 | 1 |
| Ipsos Mori | 2020-03-22 | | 38 | 43 | 4 | 10 | 3 | 0 |
| Opinium | 2020-03-20 | | 31 | 51 | 5 | 7 | 3 | 1 |
| Ipsos Mori | 2020-03-16 | | 30 | 52 | 4 | 9 | 4 | 1 |
| Opinium | 2020-03-13 | | 32 | 49 | 5 | 6 | 5 | 1 |
| Kantar | 2020-03-09 | | 29 | 50 | 4 | 11 | 2 | 1 |
| BMG Research | 2020-03-06 | | 28 | 45 | 3 | 11 | 6 | 1 |
| SavantaComRes | 2020-02-20 | | 31 | 47 | 4 | 9 | 4 | 1 |
| Opinium | 2020-02-14 | | 31 | 47 | 6 | 7 | 4 | 1 |
| Redfield and Wilton Strategies | 2020-02-12 | | 31 | 49 | 4 | 9 | 4 | 1 |
| Yougov | 2020-02-10 | | 28 | 48 | 4 | 10 | 6 | 1 |
| BMG Research | 2020-02-07 | | 29 | 41 | 5 | 11 | 8 | 1 |
| Ipsos Mori | 2020-02-03 | | 30 | 47 | 4 | 11 | 5 | 1 |
| Yougov | 2020-02-02 | | 30 | 49 | 4 | 8 | 5 | 1 |
| Survation | 2020-01-31 | | 33 | 44 | 5 | 10 | 3 | 0 |
| Yougov | 2020-01-26 | | 29 | 49 | 5 | 10 | 4 | 1 |
| Opinium | 2020-01-17 | | 30 | 47 | 5 | 9 | 4 | 1 |
| BMG Research | 2020-01-10 | | 29 | 44 | 3 | 11 | 5 | 0 |