After their 2nd best ever performance in the 2019 UK General Election, the UK polling industry flipped in the 2024 UK General Election to their 2nd worst ever performance after 1992. 6 of the last 9 elections have seen at least one party experience a major polling error. It would appear the move to web polling and lower barriers of entry has led to poorer quality polls.
UK General Elections #7 – How accurate are voting intention polls? – Revised
Voting intention polls in the UK are accurate after all!
For years, I’ve observed that UK polls on average underestimate the Conservative vote and overestimate Labour’s vote. When I converted poll data into forecasts of seats won, I had to first estimate how much polling error there would be. So what’s changed? It turns out I was comparing polls to the wrong statistic, namely national vote share. The correct comparator is in fact average vote share per seat.
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Voice Referendum #1 – My Forecast Explained
Australians will reject the proposed constitutional amendment known as The Voice in a referendum on 14th October 2023. My forecast is for NO to win the national vote by 17 percentage points and win the state count 6-0.
This article was first published on 11th October 2023. My forecast then was for NO to win 16 points and the state count 6-0.
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Coronavirus #2 – What sample size does Boris need to lift all restrictions?
April Fools day 2020 saw the hive mind of social media asking what the sample size should be to measure the extent of the Coronavirus in the UK. I could see that many people responding were reaching for standard methodologies which are usually are based on specifying a desired confidence interval. In doing so, they were overlooking a much more effective and relevant alternative based on the methodology of Acceptance Sampling, first developed by the US Military in World War 2.
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UK General Elections #5 – How accurate are voting intention polls? – updated with GE19
After 3 general elections with severe polling errors, the UK opinion pollsters redeemed themselves in the 2019 UK General Election with their most accurate performance since 1955. I base this statement on data provided by Mark Pack who has systematically recorded every opinion poll published since 1945. The challenge now for the industry is to maintain this level of performance for the next election which may be easier said than done given that 5 out of the last 8 elections have experienced a major polling error.
UK General Election 2019 Voting Intention – Final Polls
Today, the UK votes in its 3rd general election in less than 5 years. After serious polling errors in the last 3 general elections, it is understandable that everyone is taking the latest figures with a lot of salt. As it stands today, the polls are telling us that the Conservatives recovered their 2017 standing but Labour are still behind their 2017 performance.
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UK Opinion Poll Tracker #16 – December 2019
Next Thursday, the UK will vote in its 3rd general election in less than 5 years. After serious polling errors in the last 3 general elections, it is understandable that everyone is taking the latest figures with a lot of salt. As it stands today, the polls are telling us that the Conservatives have more or less recovered their 2017 standing but Labour are still behind their 2017 performance.
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UK Opinion Poll Tracker #15 – November 2019
In two weeks time, the UK will vote in its 3rd general election in less than 5 years. After serious polling errors in the last 3 general elections, it is understandable that everyone is taking the latest figures with a lot of salt. As it stands today, the polls are telling us that the Conservatives have more or less recovered their 2017 standing but Labour is still a long way from repeating their 2017 performance.
[Read more…] about UK Opinion Poll Tracker #15 – November 2019
UK Opinion Poll Tracker #14 – February 2019
After 12 months of essentially static polls despite the news being dominated by Brexit, Labour has experienced a significant worsening of their position and the Conservatives have opened up a lead over Labour that would give them a majority in parliament. Words of caution are being uttered about the extent of the Tory lead since one pollster is notably out of step with all other pollsters.
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UK Opinion Poll Tracker #13 – December 2018
The Conservatives have lost their lead over Labour but despite the parliamentary turmoil over Brexit in December, the polls do not show much movement in the grand scheme of things.
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