The first question is on immigration. Conservative justice minister Dominic Raab - a Leave campaigner - says he wants Britain to be an "outwards and open country". He says there are "benefits" to immigration but adds that "the problem comes down to the lack of control".

Labour MP and Remain campaigner Chuka Umunna says he won't deny that immigration "can pose challenges" in the labour market - but that says that's why a "good" national living wage is needed.

He adds: "This idea that we have housing problems, challenges in the NHS, school place challenges... because of all these immigrants is complete nonsense and actually lets the current government off the hook."

Laura Kuenssberg
BBC political editor

Image source, pa

Few people would pick a political fight with Tom Watson. Like Jeremy Corbyn, he has his own mandate from Labour Party members, who chose him to be the deputy, alongside the new leader.

So when he speaks, Labour listens.

That's why it was striking today that he chose to suggest that Labour needed not just to listen harder to their natural supporters on immigration, but to suggest that a future Labour government should pursue reforms to the rules that allow EU citizens from other countries to come and live in this country.

He knows that for many of the party's traditional supporters, the changes, or perhaps perceived changes, to their communities that the arrival of many particularly Eastern Europeans have brought have created worries and concerns - so much so that he said "immigration has been the backdrop to every election we have had in Britain" for the last decade.

That's quite some statement.

Read more from Laura.

Alex Salmond has said a vote to leave the EU in next week's referendum would trigger a new Scottish independence referendum.

Scottish First Minister Nicola Sturgeon has said she's only interested in campaigning for a Remain vote and will not speculate on possible political repercussions of Brexit.

But asked during the Telegraph and Huffington Post's EU referendum debate if Brexit would lead to a second vote on Scottish independence, Mr Salmond, an SNP MP, said: "If Scotland has voted Remain, then I believe it would, yes."

Ex-London mayor and Leave campaigner Boris Johnson said Scottish independence, like the EU vote, should be a "once in a generation" referendum event.

"I think that Alex needs to have a word with the first minister of Scotland, I don't know what his authority is over Nicola Sturgeon," he added.

BBC Newsbeat

Eighty 16-25-year-olds are in Birmingham to get answers on the big EU referendum issues - focusing on immigration, jobs and Britain's place in the world.

Labour's Chuka Umunna is representing the Remain campaign, with Conservative Dominic Raab talking on behalf of Vote Leave. 

You can listen on Radio 1 and 1Xtra or watch on the BBC News Channel from 2100 BST.

And if you've got a question of your own, you can join in on Twitter or Instagram using the hashtags #Newsbeat and #BBCDebate.

Pro-Remain Alex Salmond accuses both sides of the EU referendum campaign of engaging in “scaremongering”. He says there’s a “positive” case for remaining in the EU – but it’s not being made.

“Let me cheer you up and move away from the gloom-mongering that’s going on from the Remain campaign,” says Boris Johnson to Mr Salmond. He says the UK has a “huge opportunity”, by leaving the EU, to do more trade with the “93% of the world” that is outside the EU.

Boris Johnson is the first to answer the question, and says: "I think some of the language being used to scare people about the consequences of voting Leave, I do think, is extreme."

There now follows a clash between Mr Johnson and pro-Remain Alex Salmond over the impact of immigration on wages.

Getting back to the question, pro-Remain Liz Kendall says the overall referendum debate has been "horrible" and, for a lot of people, "not very enlightening".

"After June 23 we need to work to bring our communities together," she adds, and says there are many parts of the UK that have been feeling "left behind" for years.

Vote Leave's Boris Johnson says growth in the EU is slower "than anywhere else in the world but Antarctica", with "catastrophic" youth unemployment in a lot of Mediterranean countries. "The whole EU project is a machine for generating excessive bureaucracy and red tape," he adds.

Remain's Alex Salmond takes a pop at Boris Johnson, who he says wants to become PM, and he claims he wants to scrap the social chapter. "That won't give us control - it might give you control - but that'a protection that most workers in this country would like to keep", he adds.

Labour's Liz Kendall says Britain can "grow and expand jobs and opportunities" by completing the EU digital single market. On red tape, she says: "Some people call it red tape, I call it maternity leave, paternity leave". She accuses Leave campaigners including Boris Johnson and Priti Patel of wanting to erode workers' rights by leaving the EU.

Employment minister Priti Patel, for Leave, says 5% of UK businesses trade with EU "but 100% of them" are subject to a raft of regulations and rules., She says the UK doesn't need the EU to protect workers' rights - but Liz Kendall intervenes to accuse her and other Leave campaigners of wanting to erode employment laws. 

The Telegraph and Huffington Post are hosting an EU referendum debate, external featuring Boris Johnson and Priti Patel for the Leave side, and Alex Salmond and Liz Kendall for Remain.

The first question is on immigration, and the panel are asked what is a manageable level?

Mr Johnson is up first - and says he's "pro immigration". But he says "most people" feel the current level of immigration - which is running at about 330,000 - is "too high". He says immigration should be lower - though he won't give a precise number - and argues that that's only possible by leaving the EU.

Labour's Liz Kendall says she won't set a number on it either, saying the public are fed up with politicians for "making promises they don't end up keeping".

She acknowledges immigration brings "pressures" and says that should be "dealt with" - saying more effort is needed to boost housing supply and to fund areas that have the highest levels of immigration.

But she says migrants contribute a "huge amount" to the UK and criticises some of the talk about immigration which she says treats it as though it's "a disease".

Labour MP and Remain campaigner Chris Bryant has accused Vote Leave of "fantasy economics" after pro-Brexit ministers pledged that recipients of EU funding would get the same money if the UK votes to leave the EU on 23 June.

Vote Leave, he said, was "promising to spend money like a drunken sailor when it simply doesn’t exist".      

Labour deputy leader Tom Watson tells BBC political editor Laura Kuenssberg the UK should vote to stay in the EU on 23 June and push for reform of EU migration rules.

The Electoral Commission has denied shutting down Leave.EU's Brexit music festival, BPopLive.

The event organisers had accused the elections watchdog of "killing off" the event, and claimed the commission was pursuing a "spiteful vendetta" against them.

In a statement the Electoral Commission said it had "not requested or suggested that the event cannot or should not take place".

Vote Leave is having a bit of fun with its rival group Leave.EU's decision to cancel a pro-Brexit pop gig this weekend. 

Leave.EU said all the 8,000 people who had bought tickets for the event, due to take place in Birmingham, would be refunded.

But Vote Leave had a different interpretation, telling the Sun's political correspondent Harry Cole:

BBC Radio 4