Mr Murphy says that Labour will cap increases to child benefit. The Scottish Labour says "our country needs to change".

He highlights a worker on a zero hours contract who had to sleep on a factory floor as he couldn't afford a taxi ride home.

Labour shadow chancellor Ed Balls says voters on the doorsteps tell him they are not feeling the benefits of the growing economy. Is he right? Do these canvassing conversations match the national mood? And what do the polling companies have to say?

• The BBC's Nick Higham looks at some of these key questions

Ms Sturgeon says the SNP's policy is "fiscally responsible" and says it will take "two or three years longer" to clear the deficit. In return, young people across the country will benefit from investment.

Mathew Hulbert tweets, external: Only one of these individuals is standing for Westminster! #LeadersDebate #BBC #GE2015

Nicola Sturgeon says it is time to end austerity and stop the cuts.

Ms Sturgeon proposes "modest" spending increases. The deficit would reduce, she adds, but she says the SNP would invest in the health service and other public services.

• Find out more about what the SNP would do at Westminster.

Netty tweets, external: #leadersdebate balancing the books is meaningless

Jim Murphy said we can't balance the books on the back of "the disabled and poor of our country".

Mr Murphy says Labour will ask the richest people in the country to pay more in tax.

Ruth Davidson said it is important to pay off the deficit.

Ms Davidson said the Conservatives want to go after tax evaders and tax avoiders, and reduce the costs of running the government.

On the first question on cuts, Willie Rennie said it was important to balance the books.

He adds that it is important that the economic recovery continues.

Tonight's debate will be between Nicola Sturgeon, Jim Murphy, Ruth Davidson and Willie Rennie.

We are just about ready to go so settle down and enjoy.

Iain McGill tweets, external: So I managed to stay awake to see #MayweatherPacquiao - a bigger not unrelated challenge may be staying awake through #leadersdebate #ge2015

Sean Cronie tweets, external: The final Scottish #leadersdebate is about to start. This could be spectacular. #ge2015

Who is standing as a candidate in your area? Find out in our constituency profiles.

Find out what the parties standing in this election are campaigning for by going to the BBC's party policy special.

BBC political correspondent Glenn Campbell will chair the debate, which begins at 19:30. The event is being held at the Mansfield Traquair in Edinburgh.

Graham Fraser
BBC Scotland

Hello, and welcome to our coverage of the Scottish leaders' debate from Edinburgh.

The SNP's Nicola Sturgeon, Scottish Labour's Jim Murphy, Liberal Democrat Willie Rennie and Scottish Conservative leader Ruth Davidson will take part in the BBC One Scotland programme.

You can watch the debate on television from 19:30, or you can follow the event on this live page.