• David Cameron said he gave a "straight answer to a straight question" when he told the BBC he would not serve a third term as prime minister if re-elected in May

• Alex Salmond said the SNP would block a minority Conservative government by voting down its Queen's Speech if it holds the balance of power after the election

• A UKIP election candidate quit the party over comments made by the party's Scottish MEP about a Scottish government minister

• Labour's general election manifesto will contain a pledge not to raise VAT, shadow chancellor Ed Balls revealed

• UKIP selected Harriet Yeo, former chairwoman of Labour's national executive committee, as replacement general election candidate for Janice Atkinson after she was expelled from the party on Monday

• The UK will spend £280m over the next 10 years on renewing and beefing up its defences of the Falkland Islands, it was announced

That's it from Politics Live for tonight. We'll be back at 06:00 GMT with all Wednesday's political news - including the final Prime Minister's Questions before the election.

What do voters think of David Cameron's decision to rule out a third term in Downing Street? Our correspondent Vicki Young was in Hove earlier to find out. You can watch her package here.

James Cook
Scotland Correspondent, BBC News

If the Conservatives attempt to form a minority government and enough MPs vote against their Queen's Speech the administration would fall at the first hurdle and the leader of the opposition would have a shot at forming a government.

That's how parliamentary democracy works in the event of a hung Parliament.

And yet the Conservatives are saying that by planning to vote against a government he opposes Alex Salmond has "confirmed he would sabotage the democratic will of the British people in order to make Ed Miliband prime minister".

It is part of their continuing attempt to portray Mr Miliband as a weak leader whose strings are being pulled by Mr Salmond.

This kind of language causes despair among Tories north of the border who fear that the party in London is waltzing into an SNP trap.

They know that many voters in Scotland will read the phrase "democratic will of the British people" and hear "democratic will of the English people".

Because, if it is illegitimate for Scottish MPs, from whatever party, to vote against one government and support another in the British parliament, then what, voters may ask, is the point of the union?

Who is dancing to Mr Salmond's tune now?

Here's our story, external on Alex Salmond's comments to the New Statesman about a future Conservative minority government. He told the magazine the SNP would block such a government by voting down its Queen's Speech. The Conservatives say the former SNP leader "has confirmed he would sabotage the democratic will of the British people".

BBC Newsnight
BBC Two, 22:30

If Argentina "got the Falklands", could Britain get it back? Lord West, who was First Sea Lord between 2002 and 2006, says Argentina isn't capable of taking the Falklands at the moment, but British forces wouldn't be able to take it back if they did because they don't have aircraft carriers.

Simon Jenkins, from the Guardian, says it's "ridiculous" to "pretend" the UK can defend the Falklands indefinitely. The UK will have to do a deal with Argentina eventually, he says.

BBC Newsnight

Newsnight is taking a look at the possible candidates in a future Conservative leadership race. You can watch it on the live coverage tab above.

A bit of background to Alex Salmond's comment today on the SNP voting against a minority Conservative government's Queen's Speech. Back in November, when she took over the SNP leadership, Nicola Sturgeon hinted at something similar: she said her party would "never, ever put the Tories into government." The Telegraph covered the story at the time. , external

tweets, external: YouGov/Sun poll tonight - Labour and Tories still tied: CON 35%, LAB 35%, LD 8%, UKIP 12%, GRN 6%

More from Philip Hammond on the Germanwings crash in the French Alps earlier. The foreign secretary said: "This is a tragic incident for those involved and their families, I send my deepest condolences to those who have lost family or friends.

"I don't want to speculate on numbers of British nationals involved until we have completed our checks on all the passenger information.

"However, based on the information available to us, it is sadly likely that there were some British nationals on board the flight. We are providing consular assistance and will give further help as more information becomes available. We are working closely with the French, German and Spanish authorities, and the airline, to establish the facts."

Foreign Secretary Philip Hammond says "it is likely there were some British nationals" on board the Germanwings flight that crashed in the French Alps today.

tweets, external: Green Party leader Natalie Bennett says her last appearance on LBC was 'absolutely devastating' but it demonstrates she's 'a human being'

Here's our story on Tim Wilson, above, standing down as a UKIP candidate over comments made by the party's Scottish MEP about a Scottish government minister. Mr Wilson said Mr Coburn had produced "what I can only describe as an Islamaphobic insult, and that's simply not acceptable".

BBC Radio 4

David Cameron has, as you've probably noticed, said he won't stand for a third term as prime minister. But he pledged he would serve a full second term. So when would a Tory leadership take place? Could David Cameron stand down as leader of the Conservatives but remain as prime minster? James Landale has been looking at the possibility.

The Conservatives' leader in Scotland, Ruth Davidson, says Alex Salmond's plan to wield influence over Labour in a hung parliament "scares many, many Scots".

Mr Salmond told the Marr Programme on Sunday that an SNP bloc at Westminster after the election would "hold the power" and move the Labour party in a "more progressive" direction.

Writing in the Evening Standard, external, Ms Davidson says Mr Salmond does not speak for most Scottish people.

"When Salmond talks of planning to hold a weak Miliband government to ransom, that doesn't just scare people south of the border, it scares many, many Scots too," she wrote. "He is simply doing what nationalists do: trying to conflate the national interest with his own narrow, ideological one and paint anyone who disagrees as unpatriotic.

She adds: "It's cheap, dirty politics designed to send out the message that everyone north of the border is equally Scottish but some are more Scottish than others. The majority of people in Scotland want no truck with this version of divide-and-rule."

And that's all from Free Speech tonight. Were you watching? What did you think? Email us or tweet @bbcpolitics, external to let us know.