A quick look back at the main stories of the day:

• Sir Malcolm Rifkind resigned as chairman of Parliament's Intelligence and Security Committee and said he will not stand at the general election

• Commons Speaker John Bercow said Sir Malcolm and Jack Straw - who were secretly filmed apparently offering services to a private firm for cash - will be punished if found to have broken the rules

• Natalie Bennett had a tough day. As the Greens launched their election campaign, she struggled to answer questions about party policy

• The House of Lords gave the go-ahead to three-person babies, meaning the UK becomes the first country to approve such laws

• David Cameron appeared before the Commons Liaison committee for the last time before the election. He announced British military personnel are to be sent to Ukraine to provide advice and training

• The Electoral Commission revealed the number of people on electoral registers in England and Wales fell by 920,000 between March and December last year

That's all from the Politics Live team for tonight. We'll be back at 06:00 tomorrow to bring you the latest political news.

Conservative MP David Tredinnick has claimed astrology could have "a role to play in healthcare". He said astrology, along with complementary medicine, could take pressure off NHS doctors. The MP for Bosworth, in Leicestershire, who is a Capricorn, told Astrological Journal: "I do believe that astrology and complementary medicine would help take the huge pressure off doctors. 90% of pregnant French women use homeopathy. Astrology is a useful diagnostic tool enabling us to see strengths and weaknesses via the birth chart." He also acknowledges any attempt to spend taxpayers' money on consulting the stars would cause "a huge row".

Nick Robinson
Political editor

What a difference a day makes. In just 24 hours, Sir Malcolm Rifkind went from angry defiance to a grim-faced acceptance that he would have to quit his job - both as a member of parliament and chairman of the Intelligence and Security Committee.

More from our political editor on Sir Malcolm Rifkind's change of heart.

tweets, external: EXCLUSIVE: No 10 want telly historian Dan Snow, external to replace Malcolm Rifkind as MP

BBC Newsnight
BBC Two, 22:30

Former Conservative cabinet minister Lord Heseltine says that being a constituency MP "is not a full-time job". There is a huge commitment as a backbench MP but there is also plenty of time to do other things, provided it is within parliamentary rules, he says, adding that it is "healthy" to widen one's experience.

He adds: "An MP's salary is not designed to be the total income of all MPs, and that's why I believe that it should be possible for them to earn outside. What I don't want to see is the job of an MP becoming a professional activity."

BBC Newsnight
BBC Two, 22:30

"Unlike all the other parties, we think long-term", Baroness Jones adds on Newsnight. "We are thinking of the survival of the planet, the survival of humanity."

BBC Newsnight
BBC Two, 22:30

Green peer Baroness Jones tells Newsnight the party is still forming its manifesto. In a sense, therefore, today's questions were premature, she adds.

BBC Newsnight
BBC Two, 22:30

What do the voters think of Natalie Bennett's interview earlier? One tells Newsnight he doesn't think he'll vote for the party now, today's performance having confirmed "initial worries" he had. Another says she would expect Ms Bennett to have answers.

BBC Newsnight
BBC Two, 22:30

What does today's performance by Green leader Natalie Bennett say about her party? On Newsnight, Ms Bennett says her party is about more than her and Caroline Lucas, the only Green MP. She says the party will not help prop the Conservatives after the election, but may support Labour.

Vernon Coaker, the secretary of state for defence, has responded to David Cameron's announcement earlier that more non-lethal support is to be provided to Ukraine. He says more clarity is needed.

"In light of the ongoing situation in Ukraine, it is vital that the international community stands ready to increase pressure on Russia by extending economic sanctions if President Putin refuses to change course," Mr Coaker says. "While we welcome this non-lethal support package to build the capacity of Ukrainian Forces, further clarity is required as to whether this support is being offered within the NATO framework and questions must be answered as to the scale and timetable of deployments."

tweets, external: Is the #Green Party ready for prime time? Baroness Jenny Jones will be on @BBCNewsnight to discuss Natalie Bennett's difficult day

The Mirror

tweets, external: Tories should take no pleasure in Natalie Bennett's "brain fade" today. The weaker the Greens are, the fewer votes they'll drain from Labour

The Daily Telegraph

Image source, PA

On Inside the Commons, the set up of the House of Commons is discussed - specifically, whether the current layout is too confrontational. We've seen MPs shouting and waving paper at one another through the programme, so should a new shape for the chamber be considered? Prime Minister David Cameron says no: he would "hate" to see a redesigned chamber.

The Guardian

Image source, Guardian

The first of the front pages is starting to come in. The Guardian leads with British troops being sent to Ukraine and also features Natalie Bennett on her "brain fade".