The World at One
BBC Radio 4

Jeremy Corbyn has officially launched Labour's election campaign, but who might the party need to appeal to if it wants to get more votes?

Jane Green, a professor of political science who works on the British Election Study, says the current support base is among people who are "significantly more left wing than those who voted for them in 2015".

Former Labour leader Ed Miliband - who announced an energy price freeze in his party's election manifesto in 2015 -  is enjoying himself no end today. Earlier, he asked Business Secretary Greg Clark whether the Tory energy plan would guarantee that prices couldn't rise.

Having, it seems, not received a reply, he's given it another go, and cc'd Mr Clark's boss too:

The Christian Peoples Alliance is offering policies against abortion and against same-sex marriage at the general election.

Leader Sid Cordle spoke to Daily Politics presenter Jo Coburn, and then had heated exchanges with Guardian writer Owen Jones about his views on gay people.

Asked by a journalist from the Mirror about her view on fox-hunting during that Q&A, Mrs May reiterated her commitment to a free vote:

At Theresa May's first event of the day, some journalists reported a high degree of stage management in the questioning. Several point out the difference at her second:

Theresa May's questions from factory workers in Leeds ranged from school places to potholes, the NHS and foreign aid. 

She said she wanted to see a good school place for every child, to improve technical education and that the government was looking to increase the number of apprenticeships - as the push to university was "not right for everybody". 

One awkward note was struck, however, when she spotted one of her questioners was holding a pen: 

"Are you a journalist?" she asked, before returning to "workforce questions".

Image source, Getty Images

Another energy giant E.ON thinks the price cap proposal "has been made for political reasons.

"Intervention by government will harm investor confidence at a time when the country requires significant investment to deliver energy security and the low carbon agenda," it says.

Image source, Getty Images

More on the energy cap proposal, one of the UK's "big six" energy suppliers ScottishPower says: "Though the Conservatives have asked the right question, they have found the wrong answer."

Laura Kuenssberg's interview with Jeremy Corbyn about whether he will guarantee that the UK will leave the EU.

Another factory worker asks if Theresa May can guarantee that energy bills will not go up if the government implements a cap. 

"I don't think any government can promise no bills will go up year on year," she says in answer, but adds that her policy will help the market function more fairly.

Representatives from the five main parties will take part in the lead up to the general election.

Image source, Reut

Theresa May is in a factory in Leeds and has been taking questions from members of staff.

She's asked whether EU citizens will be allowed to stay in the UK after Brexit or will they be asked to leave later on.

The PM says she wants to sort that "at an early stage" and says there is "goodwill on both sides" - the UK and EU - to resolve it quickly.

But she does say it is a "complex" issue. 

More from Laura Kuenssberg's interview with Jeremy Corbyn. He appeared to tell Buzzfeed News on Monday that he would stay on as leader even if Labour lost the election. She put that to him:

JC: We're planning to win the general election so the question doesn't arise.

LK: Well, the question arose...

JC: The question doesn't arise.

LK: ...when John McDonnell and you told a different media outlet that you would stay on.

JC: The question, the question doesn't arise because we're campaigning this election to win it.

LK: You have told other media outlets that you would stay on if you lose. 

JC: I told them I would carry on as leader - we'll have won the election by then.

LK: So you will carry on as leader even if you lose?

JC: Listen, we're in this campaign to win it.

Sky News' political editor has been digging out detail on the energy cap and the original Competition and Markets authority report on it: 

Here it looks at implementing a cap for a short period.

And here raises the question if one would be compatible with EU law?

Jeremy Corbyn has declined to say whether he would categorically take Britain out of the EU if elected as prime minister.

In his speech in Manchester today he said Brexit was "settled”, but in an interview with our political editor Laura Kuenssberg he was pushed repeatedly to say whether come hell or high water, good deal with Brussels or bad, the UK would be leaving the EU.

Mr Corbyn then outlined what a good deal would look like.

Asked again about his ultimate commitment to Brexit, he replied:

Laura tried a few more times - if you're prime minister, will we leave whatever happens?  

The government says energy bills are rising and a cap would protect the vulnerable. Reality Check looks at the numbers.

A quick recap of what has happened so far today: 

• Jeremy Corbyn warned wealthy elites were trying to 'hijack Brexit'', as he formally launched Labour's campaign in Manchester. He said the UK had "four weeks to show what kind of country we are".
• Meanwhile, three Labour activists who publicly opposed their own local candidate were excluded from the party.
• Campaigning in York, Theresa May defended Conservative plans to cap energy tariffs, and responded to rumours the cabinet was divided over the issue, saying everyone sitting around that table wanted to support working families.
• Energy shares fell on the back of the pledge. 
• Before he took a ride in a rescue hovercraft in Burnham-on-Sea, Somerset, Tim Farron warned people would be "taken for granted" should the Tories win a large majority.
• The Green Party set out its health policy. Co-leader Caroline Lucas said it would remove the market system from the NHS. 
• In the Highlands and Islands it emerged no Scottish Greens would stand as candidates to avoid splitting the pro-independence vote.