Westminster Voting Intention
| End Date | Company | Client | CON | LAB | LD | Lead |
| 27 Nov 2008 | Ipsos MORI | Observer | 43 | 32 | 15 | +11 |
| 25 Nov 2008 | ICM | Guardian | 45 | 30 | 18 | +15 |
| 24 Nov 2008 | YouGov | Telegraph | 40 | 36 | 14 | +4 |
| 19 Nov 2008 | ICM | Sunday Mirror | 42 | 31 | 19 | +11 |
| 14 Nov 2008 | Ipsos MORI | 40 | 37 | 12 | +3 | |
| 13 Nov 2008 | YouGov | Sunday Times | 41 | 36 | 14 | +5 |
| 12 Nov 2008 | ComRes | Independent on Sunday | 43 | 32 | 12 | +11 |
| 07 Nov 2008 | Populus | Times | 41 | 35 | 16 | +6 |
| 05 Nov 2008 | ICM | Sunday Times | 43 | 30 | 18 | +13 |
| 31 Oct 2008 | BPIX | Mail on Sunday | 45 | 31 | 13 | +14 |
| 28 Oct 2008 | ComRes | Independent | 39 | 31 | 16 | +8 |
| 27 Oct 2008 | YouGov | Telegraph | 42 | 33 | 15 | +9 |
| 17 Oct 2008 | Ipsos MORI | 45 | 30 | 14 | +15 | |
| 17 Oct 2008 | ICM | Guardian | 42 | 30 | 21 | +12 |
| 16 Oct 2008 | BPIX | Mail on Sunday | 46 | 30 | 13 | +16 |
| 15 Oct 2008 | YouGov | Mirror | 42 | 34 | 14 | +8 |
| 15 Oct 2008 | ComRes | Independent on Sunday | 40 | 31 | 16 | +9 |
| 09 Oct 2008 | YouGov | Sunday Times | 43 | 33 | 14 | +10 |
| 03 Oct 2008 | Populus | Times | 45 | 30 | 15 | +15 |
| 03 Oct 2008 | ComRes | Independent | 44 | 25 | 17 | +19 |
| 01 Oct 2008 | YouGov | Telegraph | 45 | 31 | 15 | +14 |
| 01 Oct 2008 | ICM | Guardian | 42 | 30 | 17 | +12 |
| 26 Sep 2008 | ComRes | Independent | 41 | 29 | 18 | +12 |
| 24 Sep 2008 | BPIX | Sunday Times | 43 | 31 | 17 | +12 |
| 24 Sep 2008 | ICM | Guardian | 41 | 32 | 18 | +9 |
| 23 Sep 2008 | YouGov | Sun | 41 | 31 | 16 | +10 |
| 17 Sep 2008 | YouGov | Telegraph | 44 | 24 | 20 | +20 |
| 17 Sep 2008 | ComRes | Independent on Sunday | 39 | 27 | 21 | +12 |
| 12 Sep 2008 | Ipsos MORI | 52 | 24 | 12 | +28 | |
| 10 Sep 2008 | YouGov | Sunday Times | 46 | 27 | 16 | +19 |
| 29 Aug 2008 | Populus | Times | 43 | 27 | 18 | +16 |
| 29 Aug 2008 | YouGov | Telegraph | 45 | 26 | 16 | +19 |
| 20 Aug 2008 | ComRes | Independent on Sunday | 46 | 25 | 16 | +21 |
| 19 Aug 2008 | YouGov | Compass | 48 | 26 | 16 | +22 |
| 15 Aug 2008 | Ipsos MORI | 48 | 24 | 16 | +24 | |
| 15 Aug 2008 | ICM | Guardian | 44 | 29 | 19 | +15 |
| 14 Aug 2008 | YouGov | Sunday Times | 45 | 25 | 18 | +20 |
| 06 Aug 2008 | YouGov | News of the World | 46 | 26 | 17 | +20 |
| 31 Jul 2008 | BPIX | Mail on Sunday | 47 | 24 | 16 | +23 |
| 30 Jul 2008 | ICM | Sunday Express | 45 | 29 | 16 | +16 |
| 29 Jul 2008 | YouGov | Telegraph | 47 | 25 | 16 | +22 |
| 25 Jul 2008 | Populus | Times | 43 | 27 | 18 | +16 |
| 23 Jul 2008 | YouGov | Telegraph | 45 | 26 | 17 | +19 |
| 23 Jul 2008 | ComRes | Independent | 46 | 24 | 18 | +22 |
| 18 Jul 2008 | Ipsos MORI | 47 | 27 | 15 | +20 | |
| 18 Jul 2008 | ICM | Guardian | 43 | 28 | 19 | +15 |
| 16 Jul 2008 | ComRes | Independent on Sunday | 45 | 24 | 16 | +21 |
| 10 Jul 2008 | YouGov | Sunday Times | 47 | 25 | 16 | +22 |
| 04 Jul 2008 | Populus | Times | 41 | 28 | 19 | +13 |
| 25 Jun 2008 | ComRes | Independent | 46 | 25 | 18 | +21 |
| 23 Jun 2008 | YouGov | Telegraph | 46 | 28 | 15 | +18 |
| 20 Jun 2008 | ICM | Guardian | 45 | 25 | 20 | +20 |
| 18 Jun 2008 | BPIX | Mail on Sunday | 49 | 26 | 14 | +23 |
| 13 Jun 2008 | Ipsos MORI | Independent | 45 | 28 | 16 | +17 |
| 12 Jun 2008 | YouGov | Sunday Times | 47 | 25 | 18 | +22 |
| 11 Jun 2008 | ComRes | Independent on Sunday | 44 | 26 | 17 | +18 |
| 06 Jun 2008 | Populus | Times | 45 | 25 | 20 | +20 |
| 04 Jun 2008 | ICM | Sunday Times | 42 | 26 | 21 | +16 |
| 30 May 2008 | ComRes | Independent | 44 | 30 | 16 | +14 |
| 27 May 2008 | YouGov | Telegraph | 47 | 23 | 18 | +24 |
| 16 May 2008 | ICM | Guardian | 41 | 27 | 22 | +14 |
| 15 May 2008 | Ipsos MORI | 45 | 32 | 14 | +13 | |
| 15 May 2008 | Ipsos MORI | 41 | 28 | 20 | +13 | |
| 15 May 2008 | YouGov | Sunday Times | 45 | 25 | 18 | +20 |
| 14 May 2008 | ComRes | Independent on Sunday | 43 | 26 | 19 | +17 |
| 07 May 2008 | YouGov | Sun | 49 | 23 | 17 | +26 |
| 02 May 2008 | Populus | Times | 40 | 29 | 19 | +11 |
| 25 Apr 2008 | ComRes | Independent | 40 | 26 | 20 | +14 |
| 23 Apr 2008 | ICM | Sunday Times | 39 | 29 | 20 | +10 |
| 21 Apr 2008 | YouGov | Telegraph | 44 | 26 | 17 | +18 |
| 18 Apr 2008 | Ipsos MORI | 38 | 32 | 17 | +6 | |
| 18 Apr 2008 | ICM | Guardian | 39 | 34 | 19 | +5 |
| 17 Apr 2008 | Ipsos MORI | Observer | 40 | 31 | 19 | +9 |
| 16 Apr 2008 | Populus | Sunday Mirror | 40 | 30 | 19 | +10 |
| 10 Apr 2008 | YouGov | Sunday Times | 44 | 28 | 17 | +16 |
| 04 Apr 2008 | Populus | Times | 39 | 33 | 17 | +6 |
| 02 Apr 2008 | ICM | Sunday Times | 43 | 32 | 18 | +11 |
| 28 Mar 2008 | ComRes | Independent | 38 | 31 | 17 | +7 |
| 25 Mar 2008 | YouGov | Telegraph | 43 | 29 | 17 | +14 |
| 14 Mar 2008 | ICM | Guardian | 42 | 29 | 21 | +13 |
| 14 Mar 2008 | ICM | News of the World | 40 | 31 | 20 | +9 |
| 13 Mar 2008 | Ipsos MORI | 40 | 35 | 18 | +5 | |
| 13 Mar 2008 | YouGov | Sunday Times | 43 | 27 | 16 | +16 |
| 07 Mar 2008 | Ipsos MORI | 41 | 32 | 15 | +9 | |
| 07 Mar 2008 | Populus | Times | 37 | 34 | 19 | +3 |
| 25 Feb 2008 | YouGov | Telegraph | 40 | 33 | 16 | +7 |
| 22 Feb 2008 | ComRes | Independent | 41 | 30 | 17 | +11 |
| 21 Feb 2008 | Ipsos MORI | 39 | 37 | 16 | +2 | |
| 18 Feb 2008 | YouGov | Econ | 40 | 34 | 16 | +6 |
| 15 Feb 2008 | ICM | Guardian | 37 | 34 | 21 | +3 |
| 14 Feb 2008 | YouGov | Sunday Times | 41 | 32 | 16 | +9 |
| 08 Feb 2008 | Ipsos MORI | 42 | 33 | 13 | +9 | |
| 01 Feb 2008 | Populus | Times | 40 | 31 | 17 | +9 |
| 30 Jan 2008 | ICM | Sunday Times | 37 | 32 | 21 | +5 |
| 25 Jan 2008 | ComRes | Independent | 38 | 30 | 17 | +8 |
| 21 Jan 2008 | YouGov | Telegraph | 41 | 33 | 16 | +8 |
| 18 Jan 2008 | ICM | Guardian | 37 | 35 | 20 | +2 |
| 17 Jan 2008 | Ipsos MORI | 37 | 38 | 16 | +1 | |
| 11 Jan 2008 | Ipsos MORI | 41 | 32 | 17 | +9 | |
| 10 Jan 2008 | YouGov | Sunday Times | 43 | 33 | 14 | +10 |