Is Labour's lead five points or 10? Why ICM and YouGov disagree

It all depends on how you assume those who say "don't know" will vote when the election actually happens.

The latest monthly ICM/Guardian poll, showing that Labour's lead over the Tories has shrunk from eight points to just five, has provoked much comment. How, when most surveys show the party around 11 points ahead, can Labour have sunk so low?

To begin with, it's important to note that ICM's polls have long shown a lower Labour lead than those from other groups such as YouGov and TNS-BRMB. Seven of the last 12 polls by the company have had Labour ahead by five points or less. December's ICM poll, which showed a Labour lead of eight points, was also less flattering than the concurrent YouGov survey, which showed a Labour lead of 10.

Why the discrepancy? The main reason is the difference in how the two pollsters treat the "don't knows". While YouGov simply discounts those voters who say they "don't know" which party they'd vote for, ICM reallocates 50 per cent of them based on the party they voted for at the previous general election. This approach was originally developed to respond to the phenomenon of "shy Tories" - those who intended to vote Conservative but were unwilling to say so. In 1992, this famously meant many polls showed Labour in front when in fact it was the Tories who were heading for victory. After studying the data, ICM found that a disproportionate number of those who said "don't know" to voting intention questions in 1992 had voted for the Conservatives in 1987. The reallocation method was born.

At present, since a significant number of 2010 Liberal Democrat voters are unsure how they'll vote at the next election, while most Labour voters are sure, ICM invariably shows a higher level of support for Clegg's party than YouGov and a lower level of support for Labour. The most recent poll by the latter has Labour on 42 per cent and the Lib Dems on 11 per cent, while the most recent by the former has Labour on 38 per cent and the Lib Dems on a seemingly miraculous 15 per cent. There are good arguments for both YouGov and ICM's approaches but for those sceptical of ICM's method, it's worth pointing out that it was the second most accurate pollster in 2010.

Finally, it's worth imagining how different the political narrative would be if it was ICM, rather than YouGov, that conducted a daily poll. Since the coalition came to power, ICM has never shown a Labour lead larger than 10 points (a figure the party has only attained once, in September 2012) or a Lib Dem vote share lower than 11 per cent (the party averaged 14 per cent in 2012). Conversely, YouGov has had Labour ahead by as much as 14 points and the Lib Dems as low as seven per cent. But fortunately for Ed Miliband and unfortunately for Nick Clegg, politicos pay more far attention to a daily pollster than they do to a monthly one.

Ed Miliband would be under greater pressure if ICM's polling figures received as much attention as YouGov's. Photograph: Getty Images.

George Eaton is political editor of the New Statesman.

Newsgroup Newspapers Ltd/Published with permission
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Everything that is wonderful about The Sun’s HMS Global Britain Brexit boat

And all who sail in her.

Just when you’d suffered a storm called Doris, spotted a sad Ukip man striding around the Potteries in top-to-toe tweed, watched 60 hours of drama about the Queen being a Queen and thought Britain couldn’t get any more Brexity, The Sun on Sunday has launched a boat called HMS Global Britain.


Photo: Newsgroup Newspapers Ltd/Photos published with permission from The Sun

Taking its name from one of Theresa May’s more optimistic characterisations of the UK post-Europe (it’s better than “Red, white and blue Brexit”, your mole grants), this poor abused vessel is being used by the weekend tabloid to host a gaggle of Brexiteers captained by Michael Gove – and a six-foot placard bearing the terms of Article 50.

Destination? Bloody Brussels, of course!

“Cheering MPs boarded HMS Global Britain at Westminster before waving off our message on a 200-mile voyage to the heart of the EU,” explains the paper. “Our crew started the journey at Westminster Pier to drive home the clear message: ‘It’s full steam ahead for Brexit.’”

Your mole finds this a wonderful spectacle. Here are the best bits:

Captain Michael Gove’s rise to power

The pinnacle of success in Brexit Britain is to go from being a potential Prime Minister to breaking a bottle of champagne against the side of a boat with a fake name for a publicity stunt about the policy you would have been enacting if you’d made it to Downing Street. Forget the experts! This is taking back control!


 

“God bless her, and all who sail in her,” he barks, smashing the bottle as a nation shudders.

The fake name

Though apparently photoshopped out of some of the stills, HMS Global Britain’s real name is clear in The Sun’s footage of the launch. It is actually called The Edwardian, its name painted proudly in neat, white lettering on its hull. Sullied by the plasticky motorway pub sign reading “HMS Global Britain” hanging limply from its deck railings. Poor The Edwardian. Living in London and working a job that involves a lot of travel, it probably voted Remain. It probably joined the Lib Dems following the Article 50 vote. It doesn’t want this shit.

The poses

All the poses in this picture are excellent. Tory MP Julian Brazier’s dead-eyed wave, the Demon Headmaster on his holidays. Former education minister Tim Loughton wearing an admiral’s hat and toting a telescope, like he dreamed of as a little boy. Tory MP Andrea Jenkyns’ Tim Henman fist of regret. Labour MP Kate Hoey’s cheeky grin belied by her desperately grasping, steadying hand. Former Culture Secretary John Whittingdale’s jolly black power salute. And failed Prime Ministerial candidate Michael Gove – a child needing a wee who has proudly found the perfect receptacle.

The metaphor

In a way, this is the perfect representation of Brexit. Ramshackle, contrived authenticity, unclear purpose, and universally white. But your mole isn’t sure this was the message intended by its sailors… the idea of a Global Britain may well be sunk.

I'm a mole, innit.