Most of the time on UK Polling Report I write about what the polls tell us about public opinion. Only when elections come along do we get to do it the other way around, and see what public opinion tells us about the accuracy of the polls.

As regular readers will know I have deep reservations about naive comparisons of eve-of-election polls and results and pollster “league tables”. They are often used in an extremely simplicistic fashion, with people balancing absurd conclusions upon one pollster being one point closer in a poll with a three point margin of error. One can get a slightly better idea in a well polled election race when consistent trends can be identified (as Rob Ford, Will Jennings et al did at the last election, producing a very different league table) but ultimately all a pollster can really hope for is to be within the margin of error of the result. All else is luck.

Five companies produced polls for the London mayoral election (TNS-BMRB also did one poll, but it was early in the campaign so can’t really be compared). Their final results are below.


First round . Second Round
Pollster Johnson Livingstone Jones Paddick Benita Webb Cortiglia Johnson Livingstone
ACTUAL 44 40 4 4 4 2 1 52 48
YouGov (30th Apr-2nd May) 43 38 3 7 4 4 1 53 47
Opinium (24th-30th Apr) 43 37 6 7 3 3 1 52 48
ComRes (23rd-25th Apr) 44 37 5 6 3 3 1 54 46
Populus (27th-29th Apr) 46 34 6 5 5 3 1 56 44
Survation (18th-24th Apr) 42 31 4 10 3 5 4 55 45

YouGov, Opinium and ComRes were all within 3% of all the candidates’ actual support, with YouGov slightly overestimating Brian Paddick’s support, and Opinium and ComRes slightly underestimating Ken’s. On the final round Opinium got the 52-48 split right, with YouGov calling 53-47 and ComRes 54-46. Well done to all three of them.

I’m unsure why Populus – who are normally one of the most accurate and reliable pollsters – ended up so out, showing a 12 point lead in the second round and significantly underestimating Livingstone in the first round. One thing that springs to mind is ethnicity. Since 2008 YouGov have weighted by ethnicity in London polls and it does makes a significant difference to results (Labour support ends up too low without it). There is no mention of ethnicity on Populus’s tables… but then again, neither is there on ComRes’s tabs. Perhaps Populus were just unlucky enough to get a dud sample. They also finished their fieldwork 4 days before the election, so perhaps there was movement towards Ken in those final days (the same applies even more to Survation, whose fieldwork ended 10 days before the election, so there was plenty of time for a swing).

Note that everyone overestimated UKIP’s support… although part of that could be their decision not to put UKIP in their description on the ballot paper (though they still used the UKIP logo, which says UKIP in it.)

Survation and YouGov also produced figures for the London Assembly, figures below.

London Assembly List vote
Pollster LAB CON Green LDEM UKIP BNP Others
ACTUAL 41 32 9 7 5 2 5
YouGov (30th Apr-2nd May) 42 32 7 9 8 1 2
Survation (18th-24th Apr) 33 28 8 10 7 3 11

YouGov’s final poll for the London mayoral election gives Boris a six point lead over Ken Livingstone. Full tabs are here. On the first round voting intention stands at JOHNSON 43%, LIVINGSTONE 38%, PADDICK 7%, WEBB 4%, BENITA 4%, JONES 3%, CORTIGLIA 1%. Once second preferences are reallocated we have JOHNSON 53%, LIVINGSTONE 47% in the final round, the same lead as Boris won upon back in 2008. Note that the lead is mostly down to higher turnout amongst Boris supporters, prior to filtering by likelihood to vote the two candidates are neck and neck.

The poll also has voting intention for the London Assembly, which stands at CON 33%, LAB 44%, LDEM 9%, Others 14% in the constituency vote and CON 32%, LAB 42%, LDEM 9%, UKIP 8%, GRN 7%, BNP 1% in the list vote. This would translate into 11 seats for Labour, 8 for the Conservatives, 2 for the Lib Dems, 2 UKIP and 2 Greens.

There is also a first and final Opinium poll on the London contest here – they have first round preferences at JOHNSON 43%, LIVINGSTONE 37%, PADDICK 7%, JONES 6%, WEBB 3%, BENITA 3%, CORTIGLIA 1%. Once second preferences are reallocated it becomes JOHNSON 52%, LIVINGSTONE 48%.

I am not aware of any other final polls for the London mayoral election. The full list of polls conducted in the campaign are here. The only other polls conducted in the final week of the campaign were the previous poll for YouGov, and a Populus/Times poll which had a substantially larger lead for Boris.

There is no new polling for other elections today – YouGov carried out a poll on the Welsh local elections last month (report here) suggesting a good advance for Labour, Survation published a poll on all the locals here. For Scotland there is a distinct shortage of any polling whatsoever in recent months.

I previewed all of today’s polls at the weekend here, looking at exactly what was up for grabs in each contest. For those watching the results tonight, the English locals should start coming in around midnight, Welsh results also start coming in overnight but will be slower. The Scottish counts start on Friday, while the London results will start coming in Friday afternoon, with the mayoral result hopefully being announced late afternoon or evening.

UPDATE: One more prediction, Roger Mortimore of MORI has adapted his famous Sweet FA election prediction model to predict a Boris win (yes, it’s tongue in cheek, but it has an important lesson as Roger mentions in the footnote. There are a relatively small number of elections since the war, so it is very easy to come up with rules that fit the pattern and give them undue importance. It was logic along those lines that led a few unfortunate pundicts to predict a hung Parliament in 1997, as past history suggested a swing big enough for Labour to win overall was impossible)


The Times has a new Populus poll of the London mayoral election, which gives Boris Johnson his biggest lead so far. The first round figures are JOHNSON 46%, LIVINGSTONE 34%, JONES 6%, PADDICK 5%, BENITA 5%, WEBB 3%, CORTIGLIA 1%. With second preferences reallocated the final figures become JOHNSON 56%, LIVINGSTONE 44% – a very solid 12 point lead for Boris Johnson, twice his winning margin in 2008.

The poll also has Westminster voting intentions for London, which stand at CON 33%, LAB 44%, LDEM 11%, Others 13%, so again Boris is outperforming the Conservatives, Ken underperforming Labour. The eleven point lead for Labour in the capital represents a swing of 4.5 points to Labour since the election, suggesting a smaller swing to Labour than in the country as a whole (it would be the equivalent of a 2 point national Labour lead), and significantly less than YouGov’s recent London polls.


The Evening Standard has published the penultimate YouGov poll for this year’s London mayoral election. Topline figures for the first round (with changes from last week) are JOHNSON 44%(+1), LIVINGSTONE 41%(nc), PADDICK 6%(-2), WEBB 3%(nc), BENITA 3%(nc), JONES 3%(+1), CORTIGLIA 1%(nc). With second preferences reallocated the final figures are JOHNSON 52%(+1), LIVINGSTONE 48%(-1). Full tabs are here.

In the London Assembly the shares are CON 32%, LAB 45%, LD 8%, Others 15% in the constituency vote and CON 30%, LAB 44%, LDEM 8%, UKIP 8%, GREEN 5%, BNP 2% in the list vote. On a uniform swing this would translate into 12 seats for Labour, 8 for the Conservatives, Lib Dem 2, UKIP 2, Green 1.

The rest of the poll had banks of questions asking which candidate people thought best understood the concerns of various demographic groups and which they trusted on various issues.

On the demographics, Boris is seen as better understanding homeowners and the middle classes, Ken commuters, poorer Londonders, older people and ethnic minorities. On understanding “people like you” Ken has a narrow lead, 26% to 23%. On the issues, Ken has a lead on transport, cost of living and uniting London’s communities. Boris leads on the economy and crime, with the two candidates neck-and-neck on creating jobs.

There were also some questions on “driverless” tube trains. People support their introduction by 44% to 36%. Asked if they’ll make the tube safer, more expensive, or lead to more strikes, on balance people think they will make the tube cheaper and reduce strikes… but by 41% to 8% think it will make the tube less safe.


It’s a big week ahead, with various different elections coming up on Thursday. Here’s what we’ve got to look ahead to:

Scotland

There are local elections across all of Scotland, delayed from last year in order to de-couple the Scottish local election timetable from Scottish Parliamentary elections. Seats up for grabs are, very roughly 150 Con, 350 Lab, 150 Lib Dem, 350 SNP, 200 Others.

Scottish councils are elected by STV, meaning that the majority of Scottish councils have no one party with a majority (the exceptions are some councils with a majority of Independents, and North Lanarkshire which has a Labour majority. Glasgow did have a Labour majority, but has lost it through defections, and how well Labour does in its heartland of Glasgow given the SNP’s success there last year will be one of the main things to watch.)

The question in Scotland will largely be the battle between the SNP and Labour – the SNP made sweeping landslide gains in the Scottish Parliamentary elections last year, will that be reflected in the local elections this year, or will their support have started to fade? There has not been much recent Scottish polling to judge it by. Scottish councils are all counting on Friday, with results coming in from around lunchtime until late afternoon.

Wales

There are also local elections throughout almost all of Wales (the exception being Anglesey, currently being run by Commissioners and having its boundaries redrawn). All councils in Wales are all-out elections, and there are roughly 170 Conservatives, 340 Labour, 140 Lib Dems, 180 Plaid, 375 others up for election. In contrast to Scotland Labour did very well here in the Assembly elections, so should expect some solid gains. The Conservatives currently control 2 councils – Monmouthshire (quite solidly) and Vale of Glamorgan (quite narrowly), Labour control two, but can expect gains. Most of the Welsh councils are counting on Thursday, but with multi-members wards to count the results will be quite late into the night.

English local elections

The English district council councils are few this year compared to last year, although it’s still more than Scotland and Wales. English councils that elect all-out went to the polls last year, so apart from a handful of councils with boundary changes it is only councils that elect by halves or thirds. Altogether there are about 2400 English council seats up for election (about 1125 Conservative, 575 Labour, 530 Lib Dems, 150 others). With only a third of seats up for grabs it is harder for control of a council to change hands, but in many cases Labour already made advances in the 2011 elections, so this year they are looking to finish the job.

Attention here will be paid to the numbers of seats won and lost, and the shares of the vote won. Michael Thrasher and Colin Rallings estimate that the current positions in the polls should equate to about 700 gains for Labour, with the Conservatives and Lib Dems losing seats. Last year the Conservatives bucked expectations by gaining enough seats from the Lib Dems to cancel out their losses to Labour – that won’t happen this time as all those all-out district councils where the Conservatives picked up lots of gains from the Lib Dems are not up for election; proportionally the Metropolitans make up a much bigger chunk of the seats up for grabs.

Secondly there are the shares of the vote or, more accurately, the BBC’s projected national share of the vote which is calculated on the night by Professor John Curtice, based upon numerous “key wards” across the country where all three of the main parties are standing both this time and last time the ward was contested, allowing changes in the vote shares to be calculated and built into a picture of what the shares would be if there were elections across the whole country. The projection is for the whole country, but it is based only on local elections in England, not the Scottish and Welsh locals and not the mayoral or London Assembly elections. In 2011 the BBC figures were CON 35%, LAB 36%, LDEM 16% (these have been revised slightly since the figures released on the night), in 2010 on general election day they would have been CON 35%, LAB 27%, LDEM 26% – note how the Lib Dems do a bit better and Labour a bit worse than the general election vote on the same day. People vote differently in local and general elections.

Rallings and Thrasher make a similar calculation (called the Equivalent National Vote) which normally turns up at the weekend following the elections. The basic principle is the same, but the actual figures differ slightly – presumably through choosing different key wards and comparing to different baselines.

London Mayor & assembly elections

Perhaps the highest profile election is that of London mayor – the Boris vs Ken rematch. I think most people will already have a good idea of this one, one man, elected through the Supplemental Vote (i.e. people get to give a first and second preference, but not rank all candidates. If no one gets fifty percent on the first vote, all but the top two are eliminated and their voters second preferences reallocated). All the polls so far suggest that the final two will be Boris Johnson and Ken Livingstone, with Boris consistently holding a small lead.

The London Assembly meanwhile is elected from 14 large constituencies, and 11 top-up seats awarded by the d’Hondt system, based on a second “list” vote. In contrast to Boris’s lead in the polls for London mayor, all polls for the London assembly have shown Labour with a solid lead. The things to watch will be whether the Conservatives get enough seats to pass a budget (the assembly needs a two-thirds vote to amend the mayors budget) and the representation of smaller parties, who need to get over the 5% threshold to win representation. In 2008 the Greens and BNP managed this, in 2004 the Greens and UKIP did.

The London election doesn’t count until Friday. Results for constituencies should start arriving in early afternoon, the mayoral result should turn up in late afternoon or early evening.

Other mayoral elections and referendums

11 cities have referendums on whether or not to have an elected mayor. Birmingham, Bradford, Bristol, Coventry, Leeds, Nottingham, Newcastle, Manchester, Sheffield and Wakefield will vote on whether to adopt an elected mayor system. Doncaster, who currently have an English Democrat mayor, will vote on whether to abolish the position. Salford and Liverpool will actually elect their mayors on Thursday (Salford has already voted YES in a referendum, Liverpool didn’t hold one).

Do they matter?

Yes – it matters deeply in terms of shaping the narrative, in terms of whether a party is seen to be moving forwards and doing well, or unpopular and doing badly. In 2011 the narrative emerged that Labour had rather flopped in the local elections and the Conservatives had done well. Labour didn’t get the gains that had been expected and on the same night did very badly in Scotland; the Conservatives made gains when they had been expected to make large losses.

This week should be different – Labour are almost certain to do well in the local elections in Wales and England. The question marks are over whether Labour or the SNP will look like winners in Scotland, and the outcome of the London mayoral election. If Labour do well across the board it will give them a big boost, giving them the aura of winners and the sense of making a step towards victory (conversely, it will yet another bit of bad news for the government). If there is more of a mixed bag then the political parties will have the normal battles of each trying to portray themselves as having done well and their opponents badly. The Conservative’s best hope for a victory is Boris Johnson in London, so if he wins they’ll be focusing on that and trying to use it to draw a line under recent difficulties before moving on to the Queen’s Speech (and perhaps a reshuffle?). The Lib Dems will be hoping that they can take something from the inevitable losses to suggest they have bottomed out and got over the worst of it.

Of course, there will also be the practical impact – councillors are often the ground troops, the activists who knock on doors and deliver leaflets, so Labour’s gains will help them in the future, Conservative and Lib Dem losses will slowly hollow out their respective organisations. And, let us not forget, they also determine who actually runs some local councils for the next 4 years.