That brings to an end another eventful day on the campaign trail. To recap on the day's main stories:

• The BBC announced UKIP's Nigel Farage would be among leaders to face audience questions in regional election programmes
• David Cameron hailed new figures showing unemployment at a seven-year low
• Labour said too many jobs were part time, as it focused on youngsters' prospects
• The Ulster Unionists launched their election manifesto. Among the pledges: better mental health provision and a drop in VAT for tourism and building repairs
• Lord Ashcroft's polls in Scotland suggested the SNP was gaining more ground in key seats

Some lines coming through from Saturday's newspapers. The Guardian has an interview, external with Ed Miliband's American election guru, David Axelrod, who claims that Conservative attacks on the Labour leader over his perceived betrayal of his brother, former foreign secretary David, have "obviously failed".

Conservative Chief Whip Michael Gove has hinted to the Telegraph, external that there would be no Tory-UKIP deal if his party fell short of a majority after the general election.

"I don't want to say anything disobliging about Nigel Farage or about people in UKIP, but I've got no appetite, interest or inclination towards doing a deal with anyone," Mr Gove reportedly says.

"We're not going to get into bed with them, no," he adds.

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Allegra Stratton
Newsnight Political Editor

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After the Question Time special, the SNP's Nicola Sturgeon, Plaid Cymru's Leanne Wood and UKIP's Nigel Farage will appear in separate programmes broadcast on BBC One in different parts of the UK.

The leaders "will each answer voters' questions for half an hour" from 9.30pm, says a BBC statement, which says questions will be put to the leaders on behalf of live studio audiences by BBC presenters. The programme featuring Mr Farage will also be broadcast in Wales later that night.

"All the programmes will also be broadcast on the BBC News Channel and on BBC Parliament," says the BBC.

The BBC has released details of its Question Time election special to be broadcast on 30 April - a week before polling day.

A press release says: "A Question Time Election Leaders Special will feature one-by-one Conservative leader David Cameron, Labour leader Ed Miliband and Liberal Democrat leader Nick Clegg.

"The programme, hosted by David Dimbleby, will be broadcast on BBC One and BBC News Channel live from 8pm to 9.30pm. Each of the leaders will separately face 30 minutes of questions posed by a studio audience with the usual Question Time format."

Allegra Stratton
Newsnight Political Editor

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BBC Radio 4

Any Questions has been hearing the panel's views on the UK's commitment to spend 0.7% of national income on overseas aid, with UKIP's Mark Reckless arguing it should be scrapped.

Jonathan Dimbleby asks the audience for a show of hands - and finds they are broadly in favour of retaining the commitment.

The host is careful to point out that - unlike the audience for last night's TV debate - those in the Any Questions studio are "self-selecting" and so are not intended to be representative of the population.

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Image source, Twitter

Any Questions is on BBC Radio 4 now.

Jonathan Dimbleby is in South London with Sadiq Khan for Labour, Mark Reckless of UKIP, Conservative Secretary of State for the Environment Food and Rural Affairs, Liz Truss, and the SNP's Humza Yousaf, the minister for Europe and international development in the Scottish government.

A new national poll carried out after the party manifestos were released suggests the Tories have a narrow lead. The Survation poll for the Daily Mirror put the Tories up four points at 34%, ahead of Labour on 33% (down two points).

The poll put UKIP on 17% (up one), the Liberal Democrats on 7% (down one), and the Greens on 3% (down one). Nationally, the SNP polled a 4% share. The changes were from Survation's previous national poll, conducted on April 9. The pollster surveyed 1,314 adults online during yesterday and today.

The Conservative manifesto marks a significant toughening of rhetoric regarding the EU, according to a new analysis by academics at the University of Bath, external . Gone is talk of "balance of competencies" and "renegotiating" and in comes "repatriation of powers" and "referendum", says the research. The manifesto does not explain, however, how things like immigration controls could be secured in practice, writes reader in European politics, Susan Milner.

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Image source, Lord Ashcroft

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A Lib Dem source has dismissed the latest polls for the Conservative peer Lord Ashcroft as "irrelevant".

The constituency polling - in seats being contested by former leader Charles Kennedy and business minister Jo Swinson - suggests the SNP is gaining support in Labour and Lib Dem territory.

However, a Lib Dem source told the Press Association: