In response to a question from a woman whose (American) husband has visa problems, Mr Corbyn says Labour will change immigration laws to prevent families being split apart.

He declines to say he will cut immigration, but says a government led by him will end mass recruitment in areas like central Europe by the construction industry which undermines pay and conditions in Britain.

Asked if he felt the Brexit vote was influenced by immigration concerns, he replies that it was some - but by no means all - of the reason for the 'Leave' vote.

There are shouts and groans of frustration from the audience from those not satisfied with Mr Corbyn's response on whether he would use the UK's nuclear arsenal if forced to in a crisis. 'Answer the question," one man pleads.

Mr Corbyn, who has been anti-nuclear for decades, says he would not use nuclear weapons first, and if he was to use them second, millions of people would die.

Asked about using nuclear weapons, Mr Corbyn says: "I think the idea of anyone ever using a nuclear weapon is utterly appalling."

He says as prime minister he would be "working to avoid that".

He highlights other threats - cyberwarfare, terrorist attacks like Manchester, "globally ungoverned spaces like Libya" and environmental disasters.

Pressed about whether or not he would ever use nuclear weapons, he says he wouldn't fire nuclear weapons first.

Reality Check

Jeremy Corbyn says "95% of people in this country will pay no more in tax" under Labour's manifesto pledges. So who would be affected by the party's taxes?

He plans to make anyone earning more than £80,000 a year pay the top rate of tax, known as the additional rate, which is 45p.

The top 5% of earners already account for 47% of income tax, according to Revenue & Customs data, external.

Only a tiny proportion of employees make more than £80,000 - according to the Office for National Statistics.

So who are those big earners?

A questioner asks why Ken Livingstone has only been suspended by the Labour Party, rather than expelled, over allegedly anti-Semitic remarks. Mr Corbyn replies that the party's disciplinary process is independent of him, and is continuing.

He adds: "The way Jewish people have suffered is an appalling stain on history... I deplore racism in any form whatsoever."

Jeremy Corbyn is asked about statements he's made about "unlocking the potential" of BME people, which some have criticised as condescending.

He says it's about confronting "poverty, differential levels of spending in inner-city areas" and mentions the need for name-blind job applications.

We need a country which "comes together" in the face of poverty and discrimination, he says.

Pollsters have had a rough ride since they largely failed to predict a Conservative majority in 2015, and they're very much in the spotlight in this campaign.

A number of recent polls have suggested a trend towards Labour gaining ground, but the Conservatives remain in front according to most surveys.

View our interactive poll tracker and read the latest analysis.

Mr Corbyn defends his party's manifesto - "I urge you to read it" - and says measures like abolishing student fees and supporting mental health services are worth it.

"This nothing unusual in many other countries in the world. I think it's time to invest in our country."

Pushed on the need to increase taxes, Mr Corbyn says: "If we don't invest in schools.... where are the skilled workers of tomorrow?

"I think it's time we look at inequality in our society... poverty is a waste. If people can't get the qualifications... they want, we all lose."

Jeremy Corbyn says there are "huge problems" in funding of public services which need to be addressed.

He defends a proposed rise in corporation tax, saying it will be lower than the G7 average and Labour will create a national investment bank.

"I tell you what, I think it's worth it for a better society," he says to applause, from the audience which seems generally less boisterous than the one in Wednesday's seven-way debate..

Image source, AFP

The issue of climate change has been largely absent from the election campaign until recently, perhaps because none of the main parties have suggested major changes in the UK's stance as a signatory to the 2015 Paris Agreement on limiting global temperature rises.

But with Wednesday's announcement by President Donald Trump that he is pulling the US out of the Paris accord, the focus has shifted to how the UK should respond.

Theresa May said she was "very, very clear" when speaking with Mr Trump that she opposed his decision, and had expressed her support for the Paris deal.

But Jeremy Corbyn and others have criticised her for not joining the leaders of Germany, France and Italy in signing a strongly worded statement opposing the US president's actions.

Asked about environmental standards post-Brexit, Mr Corbyn says he wants to ensure that European environmental laws are written into British law.

He condemns President Trump's ditching of the Paris agreement, adding: "I would sign a letter with any other leader that would deplore that, straightaway."

Image source, PA

Polling suggests the state of the NHS is high on people's list of concerns.

Labour is again making the issue a central plank of its campaign, pledging to "reverse the privatisation" of the NHS. It has promised, if elected, to add about £7.4bn to annual spending in England.

Meanwhile, the Conservatives have pledged to increase NHS spending each year to £8bn a year extra by 2022.

But whose election promise adds up? The BBC's Hugh Pym takes a look here.