Loading country polling archive…
This archive contains 6,708 published national party-support polls for United Kingdom, covering 1974 to 2026. Compare individual polls, pollsters and long-term trends, then check the linked source table.
Reviewed country guide
How Great Britain and United Kingdom vote-intention polling relates to first-past-the-post constituencies, territorial parties and local grouping.
Advanced research view
Each poll is compared with a weighted average of other pollsters within 14 days. A pollster appears only after five evaluated polls in the selected range.
These are descriptive signed differences, not evidence of bias, accuracy, or future performance, and they are not a prediction.
| Party | Pollster | Polls evaluated | Median difference | Interquartile range |
|---|
Sourced context
Party, coalition, methodology and declared archive changes that affect how this series should be read.
Method & maintenance
The headline average uses polls ending within 45 days of the latest fieldwork date. Polls are weighted by recency (a 30-day half-life) and the square root of sample size, which reduces the influence of unusually large polls. Missing sample sizes use a default of 1,000. The chart can also switch to a wider smoothing window when you want a calmer line.
Trendlines are descriptive, not forecasts. Missing values are left out rather than treated as zero. Polling error, house effects, turnout and electorate wins all mean that this is a snapshot—not a prediction of election day.
This page loads a versioned Bismuth snapshot from the site. Source collection and validation run separately, so visitor pages never scrape polling sources. If a source update fails, the last verified snapshot remains available and is clearly marked as stale.