The Orange Book was the Liberal Democrat modernisers’ manifesto that promised to “reclaim liberalism” for a party that had become dominated by social democracy. Edited by David Laws, and with contributions from Nick Clegg, Chris Huhne and Vince Cable, it paved the way for the formation of a coalition government between the Conservatives and the Lib Dems that would have been inconceivable before its publication.

Now, the Blairites in the Labour Party are planning to publish their own modernisers’ manifesto that they hope will reshape politics on the Centre Left in a similar way. It is going to be called The Purple Book.

“Purple was the colour of new Labour,” says one of those involved. “It’s what you get if you combine red and blue. It symbolises the need to stay on the centre ground.” Like The Orange Book, which came out in 2004, the purple one will be made up of contributions by different writers, including Shadow Cabinet ministers, rising stars on the back benches and party advisers. Tessa Jowell, Liam Byrne and Alan Milburn are among those who have already agreed to contribute, as well as some of the new MPs, including Liz Kendall, a former aide to Patricia Hewitt, and John Woodcock, who once worked for John Hutton.

There will be other, high-profile names added to the list before the book is published in the autumn, around the time of the Labour Party conference. It is not yet clear whether David Miliband will write a chapter, although he sympathises with the aims of The Purple Book.

This modernisers’ manifesto will include essays on the economy, the role of the State, public service reform, welfare, crime, the family and social mobility. The overarching theme will be the need to move away from reliance on a big State and redistribute power to individuals and communities.

It will not just be a rehash of old policies from the Blair years. One idea is to do more to empower consumers against big business, another is to create a non-state social insurance scheme for welfare. But the blueprint will be wideranging and detailed. Already, those discussing the project hope that they may in future be known as the Purple Book group rather than Blairites – an outdated adjective, almost two decades after Tony Blair first became leader – just as some Lib Dems are described as Orange Book MPs.

The manifesto is a sign that the new Labour wing of the party is starting to reassert itself as Mr Miliband finds his feet. The Purple Book is being organised by Progress, the Blairite pressure group funded by Lord Sainsbury of Turville, the former Science Minister who gives it £250,000 a year (and has not donated any money to Labour since its current leader took over). Increasingly, Progress is balancing the power of the trade unions in the party and it is determined to flex its muscles on policy as vigorously as the barons.

The Purple Book isn’t an academic exercise,” says one of the organisers. “Ed Miliband has said he has a blank page for his policy review and we want to start making some notes on that page. This is about what Labour should be saying in 2015, not what’s happening right now. It’s not the abandonment of new Labour, it’s the next stage of new Labour.”

The choice of words is deliberate. One of Mr Miliband’s first declarations, on becoming leader of the Labour Party, was that “the era of new Labour is over”. The Purple Book brigade wants to ensure that he does not abandon the basic principles that won three elections. Although Labour is consistently ahead in the polls, is winning by-elections and looks set to clean up at next month’s local elections, many MPs are sceptical that their leader will be walking into Downing Street in 2015.

“There’s a real danger of a false dawn where Labour starts to do quite well, the coalition falters and we retreat to our comfort zone,” says a Shadow Cabinet minister. “But we can’t just be the party of protest. The new Labour brand may have become contaminated but the underlying principles are as relevant today as they’ve ever been.”

There is a personal dimension to all this, of course. Privately, some of the supporters of the more Blairite older Miliband brother, David, are still not entirely reconciled to the fact that he lost to his younger brother. One frontbencher told me recently that there isn’t a day that goes by when he doesn’t wish that David, not Ed, had won the leadership. Another senior MP is brutally frank: “Ed’s not doing badly enough for us to get rid of him but he’s not doing well enough to win power.” David Miliband is not out of the game: he remains in close touch with many of those who backed him for the leadership, although nobody detects a plot.

But this is also a political issue. Labour is winning votes from disillusioned Lib Dems and its own former supporters who are returning to the fold, but it still has a mountain to climb in the South East, among the aspirational “conservatory-building classes” who were key to its previous election victories. Mr Miliband has rightly identified the “squeezed middle” as a crucial target audience but not everyone agrees about how to win these voters over. There has not been a revival of the factionalism of the TB-GB years, but tensions are emerging behind the scenes, within the Shadow Cabinet and beyond, over how far Labour should admit to mistakes on the economy, as well as the extent to which the party should distance itself from its “new” Labour past.

In a recent speech, Douglas Alexander, the Shadow Foreign Secretary who was David Miliband’s campaign manager, called for his party to revive the spirit of the “mid-Nineties modernisers” for whom “making the party comfortable was never enough. The aim was always to make the public comfortable with the idea of living in Labour Britain.”

Len McCluskey, the Unite general secretary, by contrast, says his union will not give money to Labour again until it recognises that “you can’t ignore your roots”. The Purple Book will make the case for reaching out rather than digging down. In this at least it is just like The Orange Book. There are, the organisers say, some “common themes” around the role of government and decentralisation. In fact it is possible to see scope for a new Lib-Lab alliance, grown out of the liberal Centre rather than the social democratic Left. With orange and purple all the rage on the catwalks this year, this could be the colour-blocking coalition.


Photo: Lamazone