A majority of Stormont Assembly members have for the first time voted to legalise same-sex marriage in Northern Ireland, but a voting mechanism triggered by the Democratic Unionists means the law change will not happen.

A look back at what's been happening in the world of UK politics today.

• David Cameron has defended proposed new web surveillance powers, saying the internet cannot become a "safe space" for terrorists and criminals
• The British and German economies are the "beating heart" of Europe, George Osborne has said as he heads to Berlin for talks on reforming the EU
• Plans to give housing association tenants the right to buy their homes will become the first test of "English votes for English laws" when they are considered in the Commons late
• Ahead of the Housing Bill's, external second reading, Speaker John Bercow said parts of it "apply exclusively" to England and others to England and Wales only.
• The government says it wants to speed up the adoption process "so children are placed in a loving home as soon as possible"
• Scotland Office secretary David Mundell has said changes to the Scotland Bill will make it clear "beyond any reasonable doubt" that the UK government has delivered on the vow of more powers for Holyrood

The World at One
BBC Radio 4

Shadow defence secretary Maria Eagle, who is leading Labour's defence review - including of Trident - says she welcomes input of Scottish Labour into internal debate - saying it will feed into the review.

"But this does not change UK Labour Party policy. Defence isn't a devolved matter," she says. Labour's policy is "quite clear" - it is in favour of Trident renewal, she adds.

Asked how long the review will take she says a timetable hasn't been set, but rather ominously concedes "it won't be short".

The World at One
BBC Radio 4

The Scottish Labour party voted overwhelmingly to scrap Britain's nuclear weapons programme at the weekend - even though their leader is in favour of it. Both party members and unions voted 70% in favour of the motion. It means Labour now holds different positions on the issue north and south of the border.

Stephen Low, Glasgow CLP member and the Labour activist who put forward the motion to scrap Trident yesterday, says the vote was an "overwhelming endorsement".  Asked whether it will strengthen Jeremy Corbyn's position, he tells the World at One: "Very definitely."

The Daily Politics

Labour MP Jess Phillips and Conservative MP Philip Davies debate the merits - or not - of holding an International Men's Day debate in Parliament.

It comes after Mr Davies made the request to the Backbench Business Committee, of which Ms Phillips is a member. She said the idea male MPs did not have the opportunity to raise questions on men's issues, given the majority of men in Parliament, was "laughable". But she tells Daily Politics she does care about the issues that men face.

Philip Davies contests that there's a difference between the number of men in Parliament, and the debate about men's issues. He says high suicide rates among men, low achievement of boys in schools and "under-reporting of male domestic violence" are "rarely debated" in Parliament. Ms Phillips supports the annual debate to mark International Women's Day, so why not a men's day debate, he asks.

Ms Phillips says she would like to see Parliament debate men's issues but Mr Davies' call for a debate "was a mealy-mouthed 'well the girls get one'."

The Daily Politics

MPs are debating the government's Housing Bill later. Conservative MP Suella Fernandes says there is a housing "crisis" of "epic proportions" in the UK, and the solution is to increase housing supply.

Asked about the potential impact of plans to extend the right to buy to housing associations, she says there is provision in the bill for replenishment of housing stock.

"This is so unreal," chips in Keir Starmer, Labour MP for Holborn and St Pancras, who brands the plans "a disaster".

The Daily Politics

However, she went on to say there was a need for "balance" and to consider the impact that strikes had on ordinary men and women going about their daily lives. She cited last year's NHS strike, suggesting that it was unfair because only 19% of union members voted for it. 

The Daily Politics

The TUC's Frances O'Grady calls on the government to allow union members to vote electronically online in strike ballots. She also criticises plans in the Trade Union Bill, external to allow employers to bring in agency workers during a strike. 

She warns the bill risks creating situations "where people are forced not to comply with the law" - and urges the government to rethink the plans.

The Daily Politics

Labour MP Keir Starmer says it's Labour's position that "a new law is needed with strong safeguards". He says the party is in conversation with leader Jeremy Corbyn about the bill.

Conservative MP Suella Fernandes says three independent reviews of terrorism legislation feed into the government's bill - and she says there will be "heightened scrutiny" of the proposals.

The Daily Politics

What do the public make of surveillance powers? Joe Twyman, from polling company YouGov, says if you ask specifically about anti-terrorism powers "a majority do approve of that", with about a third opposed. 

If you ask about the general principle, about four in 10 oppose it, and three in 10 support it . When it comes to local councils being able to check on recycling "support falls away".

Norman Smith
Assistant political editor

The Daily Politics

On Wednesday the government will publish its Investigatory Powers Bill, external which would let police see websites people have visited but not the specific pages they have viewed without a warrant.

Discussing the plans on the Daily Politics, Labour MP and former director of public prosecutions Sir Keir Starmer says he thinks there needs to be judicial oversight. "Privacy is too important to us to be left to a politician," he says. He agrees new laws are needed but there needs to be "robust safeguards".

But Suella Fernandes disagrees with him on the matter of judicial oversight, saying the power should lie with the home secretary. The Conservative MP argues that the bill strikes the "right balance", with "an element of judicial involvement".

David Cameron says he welcomes a cross-party campaign on mental health.

He said: "It's vital we do more on mental health. We are." He added the number of people getting talking therapies has doubled.

He cites the introduction of waiting lists for mental health treatments and says mental health is now given the same "parity of esteem" as other health issues.

David Cameron is also asked about Saturday's Sinai plane crash. Mr Cameron says the UK government is "looking very carefully at what happened on that plane", saying it was a "tragedy". He says travel advice to the area is unchanged.

If anything changes the government will act, "but we must do it on the basis of evidence, and not speculation", the PM says. Mr Cameron also reveals:

Do you regret your pledge that you will not serve a third term? David Cameron says "it was the right decision", telling This Morning that 10 years is "a good long time" to be prime minister and the public will probably want a change in 2020.