Image source, Getty Images

And that's it - the debate is over. More analysis to come, but the main event has finished.

Mr Darling says "of course Scotland can go it alone" but he does not believe the country will be as successful as it would be within the United Kingdom.

"I make no apology for returning to the issue of currency," Mr Darling says, "because it is fundamental to the economy of Scotland" and Alex Salmond has no answers.

"We have no option but to say politely but firmly No thanks to independence," he ends.

Alex Salmond says independence is an opportunity that might not come again.

He says it's about "taking the future of our country in to our own hands".

The No campaign has nothing positive to says about the future of Scotland, he says.

The first minister says in an independent Scotland there is one thing for certain and that is the people of Scotland will always get the government they vote for.

"This is our time, let's seize it with both hands," he ends.

Andrew Black
Political reporter, BBC Scotland

Even though we've not had the referendum vote, people are wondering what happens on the 19th September, given the, at times, very heated nature of the campaign. Both Mr Salmond and Mr Darling say its in the interests for both sides to come together, whatever be outcome.

And on to the closing statements, as the clock runs close to the end.

Mr Salmond is first up.

aileen phillip, external: #bbcindyref Why are the number of working age Scots falling in Scotland if it's such an attractive proposition Mr Salmond?

neilmcevoy, external: Astonishing that Darling offered more devolution, but can't name 1 devolved job creating power they'd give. #bbcindyref

We're on to the final section of the debate: "What happens after the independence referendum?"

The question from the audience is "How will Westminster and Holyrood work together after this vote?"

Mr Darling says the campaign has got much more heated in the past few weeks. He says both sides have to accept the result and then work together to build a better Scotland.

Mr Salmond says it has been the most "extraordinary and energising" campaign in Scottish history.

The first minister says he will pledge to have the best talent in Scotland to negotiate the best deal for Scotland after a "Yes" vote. He invites Alistair Darling to join Team Scotland.

Sarah Baldwin: This cross examination is not working, the bickering is on an epic scale - talking over each other and can't distinguish what their points of view are.

Sandra Young: As a Scot living in England, I understand why Alex Salmond has not allowed us to vote. I believe most would vote to keep the Union.

Kenny Lambie: If Scotland does gain independence, can we in Orkney and Shetland get independence from Scotland? We would have a right to the oil as well if you believe all that Mr Salmond says.

Andrew Black
Political reporter, BBC Scotland

As expected, the issue of removing Trident nuclear weapons from their base on the Clyde under independence (a defining SNP policy) comes up.

Aside from the moral and defence case for and against keeping them, Mr Darling says Trident removal risks 8,000 jobs, while Mr Salmond says a conventional Scottish defence force would employ more people.

Mr Salmond says conventional defence forces will generate more jobs than a nuclear missile system.

Mr Darling says moving Trident could be very expensive and could take a very long time. It will also lead to a huge loss of jobs and expertise from Scotland.

Benji from Edinburgh: Darling evasive, defensive on question time - almost lost the plot! Blown away and bumbling!

Norrie from Stevenson: What a pure rammy!! Alex Salmond was a disgrace, shouting over Alastair Darling to the point I almost switched off. We're supposed to be talking about the future of our country and the SNP cannot even guarantee our currency. What a shambles.

There is a five-year timetable for the removal of Trident, Mr Salmond says. There would then be a 10-year period to build up Scottish defence forces.

Mr Salmond says the people of England might not want Trident towed down to them and might make a "sensible choice" not to renew the nuclear weapons.

Scotland's place in the world is the next section.

"What happens after Trident is removed from Scotland? What happens to Faslane, where it is based?" asks a member of the audience.

Mr Salmond says Faslane will be the headquarters of the Scottish defence forces. He says he is "very conscious" of his responsibility to the local community in Faslane.

Mr Darling says if Trident goes, all the other work will go too. He adds that Scotland can ill-afford to lose 8,000 jobs from the Clyde.

"Towing the nuclear warheads down the coast to England" will not mean there are any fewer nuclear weapons in the world but it will be a massive blow to the economy of the west of Scotland, he says.

• Want to know more about Trident and how it fits into the debate? Go to our Daily Questions section.

Caroline Cheetham, external: I have learned nothing tonight. Grown men squabbling like my two children. How to put people off politics! #bbcindyref

John Mead, external: If Salmonds negotiation tactics is to talk over anybody that disagrees with him, Good Luck Scotland

Sandy Gavryluk, external: Got to say Alex is controlling this debate. Last 15 mins should be 3 x 4 mins rounds of no hold barns #bbcindyref

Louise Sayers
BBC Scotland

As an Aberdonian, "No" voter Robyn Shepherd is concerned about Scotland's economy being based on oil.

"I live in a city that is oil rich but this wealth isn't shared. Property in Aberdeen is so expensive, so many people are struggling and find it impossible to get on the housing ladder," she says.

James Paterson: Nothing new in the debate, shouting back and forth, and will just alienate people about politics.

Margaret Anderson emails: It's 9.30pm and they're interrupting each other so much that it's turned into a rabble. I'm switching over!

Duncan Livingstone emails: Salmond will say anything to get applause. He promises everything to everyone and relies on Anglophobic rhetoric - he's the worst kind of nationalist

Mark Collie emails: How bad is this? I wouldn't teach my kids to argue like that never mind debate. Darling would be better playing it cool and just listen to what is being said instead of his prepared script.

Brian Taylor
Political editor, Scotland

Mr Salmond's turn and he pursues AD over the issues of welfare and the NHS. He quotes Unison as discerning a threat to expenditure upon health - and repeatedly invites Mr Darling to agree with the statement. He does not.

Again, on the next topic, the FM's approach is to question Mr Darling relentlessly, asking for job creating powers under enhanced devolution. It is argument by attrition. Mr Salmond appears content that he had discomfited the former Chancellor. Mr Darling says his rival's arguments are absolute nonsense.

How much will replacing Trident cost? asks Mr Salmond. £4bn a year, Mr Salmond says. Is it a sensible use of resources when the NHS is under pressure? he asks.

And on Mr Salmond goes. He's on a roll now. "Name three job-creating powers that you will guarantee to the Scottish Parliament?".

Mr Darling says the Scottish Parliament already has many powers. He says staying part of the UK is the best way of creating jobs in the future. He says the only thing you have to offer is cutting the rate of corporation tax, that would be "great for Starbucks but no-one else".

It all got very hectic and shouty and Glenn Campbell calls a break.

Andrew Black
Political reporter, BBC Scotland

There are some things Mr Salmond and Mr Darling actually agree on, like doing away with controversial welfare reforms and UK spending cuts - but even these issues are a source of dispute.

Mr Darling says the solution is a Labour government at the next UK election, while Mr Salmond says the party has shown its true colours by getting "in bed" with the Tories as part of the Better Together campaign to keep the Union.

Emily Craig
Political analyst, BBC News

Alex Salmond says an independent Scotland would have been £8bn better off. He used this figure in the first debate and it wasn't immediately clear where it was from.

The Scottish government has pointed us to an analysis, external suggesting an independent Scotland would have seen an extra £8.3bn over the last five years, which is the difference (in cash terms) between the Scottish and UK deficits during that period.

This scenario assumes Scotland would have kept a geographical share of North Sea oil and gas revenues.