Now at the podium, a bit of celebrity - Julie Hesmondhalgh, formerly of Corrie, but perhaps best known right now for Broadchurch.

She says the election of Jeremy Corbyn as Labour leader was the most "exciting and exhilarating" moment she'd seen in party politics during her lifetime.

She says the party now has "30 days to be on the right side of history".

"Thirty days to create the opportunity for a fairer, better, more equal society."

"Dust yourselves down, there's a fight to be had," says Ian Lavery, campaigns and elections chairman of the party.

He says the Labour movement was "born in struggle" and the party understands the fight it now has.

"This cannot be allowed to continue," says Ian Lavery, with considerable passion and volume.

"It's 2017 and the Labour Party will stand for it no more. It doesn't have to be this way."

The Labour manifesto will speak to the young and old, he says, protecting everything from Surestart children's centres to free bus passes.

As Ian Lavery, shadow minister, warms up the crowd with an extended attack on the Tories, Jeremy Corbyn's team are gathered on either side of the stage.

He lists some of Labour's plans - ban zero hours contracts, tackle child poverty and invest more in the NHS.

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Let us know by sending in your questions here.

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And the mood music at the Labour launch before Jeremy Corbyn takes to the stage?

All together Now by The Farm, from 1991.

Green Party co-leader Caroline Lucas says she's detecting "enormous enthusiasm" for the idea of "progressive" anti-Tory alliances among grassroots activists and the public at large.

They see it as “grown up politics", she says, and a recognition "that if we want to avoid a massive Tory landslide we can do that, but we need to act now, not wait until June 9th to wish we had done things differently".

The Labour and Lib Dem leaderships, however, have been “less forthcoming” about the idea, which Ms Lucas calls “desperately disappointing”.

The Green Party says it won't stand in the seats of Pudsey and Morley and Outwood in exchange for Labour candidate pledges to "respect Green values". 

Both seats are held by Conservatives - Morley and Outwood belonged to former shadow chancellor Ed Balls until his defenestration in 2015.

More than a million applications to register to vote have been made since Theresa May called the general election. 

Almost a third of them have come from people aged under 25. Applications from those aged 25 to 34 make up another third, government figures show.

The deadline to register to vote is Monday 22 May.

Three activists in Jeremy Hunt's constituency are told they are ineligible to remain party members.

Laura Kuenssberg
BBC political editor

Bob Dale
BBC Live reporter

A £1m piece of street art appears in your town overnight.

So do people in Dover like their Brexit-themed Banksy?

Press Association

Tory plans to cap energy tariffs are a "gimmick" Lib Dem leader Tim Farron says. He told PA: 

Image source, EPA

SNP deputy leader Angus Robertson, above with Nicola Sturgeon, will not face a pro-independence candidate in his general election battle to retain his seat in Moray - after the Greens confirmed they would not stand. 

The Highlands and Islands Green Party said it would not field candidates in any of the six Highland constituencies. 

It's an indication of an emerging "progressive alliance" between the party and the SNP. 

The decision is expected to boost the SNP's chances of retaining the Moray seat. It is one of the Conservatives' key election targets.

Image source, PA

The Independent's political correspondent has this update:

Image source, Twitter

Lawrence Slade, CEO of Energy UK, on energy tariff cap proposed in the Tory manifesto

The Sun has surprised itself this morning, tweeting that it has found agreement with Jeremy Corbyn over one policy pledge - to scrap hospital parking charges in England.

But their assent comes with certain caveats...