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Nigel Marriott's Blog

An independent statistician using data to understand our world and to predict the future

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UK General Elections #5 – How accurate are voting intention polls? – updated with GE19

December 29, 2019 By Nigel

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.

[Read more…] about UK General Elections #5 – How accurate are voting intention polls? – updated with GE19

Filed Under: Elections, Forecasting, Polling Tagged With: Election forecasting, elections, GE2019, Opinion Polls

UK General Election 2019 #2 – My forecast is the most accurate & beats the Exit Poll!

December 16, 2019 By Nigel

At 2200 on Thursday 12th December 2019, the BBC/ITV/Sky Exit Poll was revealed to the nation and pointed to a large majority for the Conservatives.  Unlike 2017, I was able to turn to my wife and say “it looks like I will be right this time!”  By the end of the night, Gavin Freeguard from the Institute of Government was tweeting that not only was I the most accurate election forecaster of 2019, I was more accurate than the Exit Poll.

[Read more…] about UK General Election 2019 #2 – My forecast is the most accurate & beats the Exit Poll!

Filed Under: Elections, Featured blog, Forecasting Tagged With: BBC, Brexit, Election forecasting, Exit poll, Forecasting model, GE2019, general election 2019, ITV, John Curtice, Politics, Seat forecast, Sky

UK General Election 2019 #1 – My Official Forecast

December 12, 2019 By Nigel

My forecast for the 2019 UK General Election this Thursday is that the Conservatives will win a majority of 72 seats.  The margin of error in this forecast is very wide though due to the fact that 5 of of the last 7 general elections have seen a major polling error.  If there is a repeat of the GE2017 underestimate of Labour, then there will be another hung Parliament.

[Read more…] about UK General Election 2019 #1 – My Official Forecast

Filed Under: Elections, Forecasting Tagged With: Brexit, Election forecasting, Forecasting model, GE2019, general election 2019, Politics, Seat forecast

UK General Election 2019 Voting Intention – Final Polls

December 12, 2019 By Nigel

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.

[Read more…] about UK General Election 2019 Voting Intention – Final Polls

Filed Under: Elections, Polling Tagged With: GE19, GE2019, general election 2019, Opinion Poll Tracker, Opinion Polls, Voting Intention

EU Election 2019 #1 – How many MEPs will each party win?

May 21, 2019 By Nigel

Here is my forecast for the election that was not supposed to be happening in the UK.  The Brexit Party is well on course to be the largest party and could even set the record for the best ever vote share by a party in the d’Hondt era of EU elections in the UK.  At the same time, the Liberal Democrats have the possibility of beating both the Conservatives and Labour parties in a UK-wide election for the first time since 1906.

[Read more…] about EU Election 2019 #1 – How many MEPs will each party win?

Filed Under: Elections, Forecasting Tagged With: Election forecasting, EU Election 2019, EU Referendum, Forecasting model, Politics

EU Referendum #6 – Find your way out of the Brexit maze in 9 Days!

March 20, 2019 By Nigel

Theresa May has just asked the EU Council for a 3 month extension to Article 50, the Speaker won’t allow another meaningful vote without meaningful changes, Jeremy Corbyn is pondering backing another referendum and in 9 days time, the UK could be leaving the EU without a deal.  Just another week in the Parliamentary Brexit Maze but I have updated my Brexit Voting Factions after last week’s votes and identified an 8th faction for you to play with in your voting permutations.
[Read more…] about EU Referendum #6 – Find your way out of the Brexit maze in 9 Days!

Filed Under: Elections Tagged With: Brexit, EU Referendum, Parliament, Politics, Segmentation

EU Referendum #5 – Find your way out of the Brexit maze in 16 Days!

March 12, 2019 By Nigel

*** This post is not yet complete.  However you will find a link to the data near the bottom and a link to a twitter thread for some of the images ***

Within the next 10 days, the House of Commons will get a second Meaningful Vote on the Withdrawal Agreement which could be followed by 2 more significant votes on No-Deal and Article 50 Extension.  I have been tracking how MPs have voted on the first Meaningful Vote and subsequent Amendments which I summarised in two posts “Find your way out of the Brexit Maze in 57 days and 43 days.”  Following further amendments at the end of February and with no more amendments planned before the next meaningful vote, I have redone my cluster analysis to predict what the outcome of these votes might be.  As far as possible, I am trying to base my predictions on what MPs have done rather than what they say but I will compare my analysis with that of Election Maps who have been tracking MP’s statements.
[Read more…] about EU Referendum #5 – Find your way out of the Brexit maze in 16 Days!

Filed Under: Elections Tagged With: Brexit, EU Referendum, Parliament, Politics, Segmentation

EU Referendum #4 – Find your way out of the Brexit maze in 43 Days!

February 15, 2019 By Nigel

Rather than celebrating love on Valentine’s day, Parliament chose to use the occasion to emphasise their discord over the EU withdrawal process, 43 days before the UK is due to leave the EU.  Three amendments were voted on and this allows me to update my Brexit voting blocks which I first described in “Find your way out of the Brexit maze in 57 days!”.

This post was updated on 22nd February 2019 to take into account the resignations of 9 MPs from the Labour party. and 3 MPs from the Conservative party.

[Read more…] about EU Referendum #4 – Find your way out of the Brexit maze in 43 Days!

Filed Under: Elections Tagged With: Brexit, EU Referendum, Parliament, Politics, Segmentation

EU Referendum #3 – Find your way out of the Brexit maze in 57 days!

January 31, 2019 By Nigel

January 2019 has been a month of considerable parliamentary drama in the UK as MPs wrestle over whether to approve the Withdrawal Agreement between the UK and the EU.  There is no shortage of political punditry and quotes from politicians and the whole episode is proving to be a classic example of uncertainty.  For statisticians like myself, uncertainty occurs when you cannot properly price the odds of an event happening unlike risk which occurs when you can price the odds.  Since the current state of affairs will ultimately be determined by parliamentary votes one way or the other, is it possible to use parliamentary vote data so far to estimate the odds of certain scenarios?

[Read more…] about EU Referendum #3 – Find your way out of the Brexit maze in 57 days!

Filed Under: Elections Tagged With: Brexit, EU Referendum, Parliament, Politics, Segmentation

UK General Elections #4 – Jeremy Corbyn’s road to Downing Street

January 14, 2019 By Nigel

The fevered political climate in the UK at the moment is all about Brexit and possible second referendums and general elections.  Jeremy Corbyn made it clear recently that he wanted a General Election now so that he could take over the Brexit negotiations.  With that in mind, I decided to take a look at what Labour’s target seat strategy could look like based on the results of the 2017 general election.  What I see at the moment is that Labour has many ways of becoming the largest party in Parliament but the road to a working majority is much harder than people realise due to the Brexit realignment in 2016 and the Nationalist realignment in Scotland in 2015.

[Read more…] about UK General Elections #4 – Jeremy Corbyn’s road to Downing Street

Filed Under: Elections Tagged With: Brexit, elections, EU Referendum, Politics

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