Eastleigh shows why Labour-Lib Dem tactical voting will matter in 2015

With the Tories in second place in 38 of the Lib Dems' 57 seats, Labour will need to consider whether to tacitly advise its supporters to vote for Clegg's party.

The first poll on the Eastleigh by-election, courtesy of Lord Ashcroft, suggests that the contest will be as tight as expected. The Conservatives are in the lead on 34 per cent, three points ahead of the Lib Dems, who have held the seat since 1994 (another by-election). But when all responses are included, rather than those certain to vote, the positions are reversed, with the Lib Dems three points ahead of the Tories (32-29). The challenge for Clegg's party, which holds all 36 council seats in the constituency, will be getting out its vote. 

Labour is in third place on 19 per cent, an increase of nine points since the general election, but far behind the Lib Dems and the Tories. On last night's edition of This Week, Alan Johnson bluntly declared: "Labour aren't going to win." 

Among other things, then, Eastleigh is a reminder that tactical voting will be a major issue in 2015. Indeed, if the Conservatives win on 28 February, it will become an issue immediately. The Tories are in second place in 38 of the Lib Dems' 57 seats and half of those on its target list are held by Clegg's party. If Labour is to prevent the Tories from decapitating scores of Lib Dems, it will need to consider whether to advise its supporters to cast tactical votes. In 2010, Ed Balls and Peter Hain both argued that Labour supporters should consider lending their votes to the Lib Dems in seats where the party couldn't win. But after five years of Clegg and co. acting as the Tories' "accomplices", it is doubtful whether many Labour figures will repeat this call. 

The biggest electoral headache for the Conservatives remains that any collapse in the Lib Dem vote will work to Labour's advantage in Tory-Labour marginals, as was shown in the Corby by-election. If this patten is repeated at the general election, the Tories stand to lose dozens of seats - there are 37 Con-Lab marginals where the third place Lib Dem vote is more than twice the margin of victory. 

If they are to stand any chance of winning a majority at the next election or even remaining the largest single party, the Tories need to hope for a partial Lib Dem recovery.

Nick Clegg with Ed Miliband at Buckingham Palace to mark the Duke of Edinburgh's 90th birthday on June 30, 2011 in London. Photograph: Getty Images.

George Eaton is political editor of the New Statesman.

Photo: Getty
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Cabinet audit: what does the appointment of Liam Fox as International Trade Secretary mean for policy?

The political and policy-based implications of the new Secretary of State for International Trade.

Only Nixon, it is said, could have gone to China. Only a politician with the impeccable Commie-bashing credentials of the 37th President had the political capital necessary to strike a deal with the People’s Republic of China.

Theresa May’s great hope is that only Liam Fox, the newly-installed Secretary of State for International Trade, has the Euro-bashing credentials to break the news to the Brexiteers that a deal between a post-Leave United Kingdom and China might be somewhat harder to negotiate than Vote Leave suggested.

The biggest item on the agenda: striking a deal that allows Britain to stay in the single market. Elsewhere, Fox should use his political capital with the Conservative right to wait longer to sign deals than a Remainer would have to, to avoid the United Kingdom being caught in a series of bad deals. 

Stephen Bush is special correspondent at the New Statesman. He usually writes about politics.