WESTMINSTER POLL
Opinium – 12-14 August 2026
Fieldwork12–14 August 2026
Sample2,050
| Labour | 27% |
|---|---|
| Reform UK | 25% |
| Conservative | 18% |
| Green | 11% |
| Liberal Democrats | 10% |
| Other | 5% |
| SNP | 3% |
| Plaid Cymru | 1% |
Party figures are shown where available in our records, including SNP and Plaid Cymru. A missing entry does not mean zero. Other follows the pollster's published grouping.
Labour led this Opinium Westminster voting-intention poll on 27%, followed by Reform UK on 25% and the Conservatives on 18%.
Change since the previous Opinium poll
Compared with Opinium's previous poll (5–8 August 2026):
| Party | Previous | This poll | Change |
|---|---|---|---|
| Labour | 27% | 27% | – |
| Reform UK | 25% | 25% | – |
| Conservative | 19% | 18% | −1 |
| Green | 12% | 11% | −1 |
| Liberal Democrats | 10% | 10% | – |
| Other | 5% | 5% | – |
| SNP | 2% | 3% | +1 |
| Plaid Cymru | 1% | 1% | – |
Changes are in percentage points. Small movements between polls may reflect sampling variation rather than a sustained change in support.
Other recent Opinium polls
For a wider comparison across pollsters, see the UK Decides Poll of Polls.
Source: Original poll publication