Image source, PA

Did you know MPs are not allowed to refer to each other by name? Nor are they allowed to talk to any one person directly, except the Speaker.

The Independent has come up with Nine absurd things you're not allowed to do in Parliament, external and it's all rather interesting.

MPs must not call each other "liars" or "hypocrites", nor “pipsqueak” or "tart" - not always easy, we suspect. 

And if there's any MP considering wearing a suit of armour in the commons, forget about it.

The Daily Politics

If David Cameron has his way, the election of a majority Conservative government in the UK should lead to a renegotiation of Britain's relationship with the European Union.

And any new deal will be put to British voters within two years as they will be allowed to choose whether they want to stay in the EU, or leave.

Ellie Price reports from Brussels on European reaction to what David Cameron will want - and what he may get. Watch the film

Image source, bbc

The Daily Politics

Voters in the Republic of Ireland can take part in a referendum next Friday on whether or not to legalise gay marriage. In a Daily Politics film from Galway, Adam Fleming hears how the debate has become heated in a country where religion still has a big part in public life. Watch the film

BBC News Channel

Commentator Dan Hodges tells the BBC News Channel that with Chuka Umunna throwing his hat out of the ring, there might now be a shift in Labour party support back to the "grown ups"  - such as Yvette Cooper and Andy Burnham.

Back in Scotland and Prime Minister David Cameron has responded to the row over his choice of Andrew Dunlop for the Scotland office earlier.

This morning Scottish Deputy First Minister John Swinney called the appointment "scandalous" because Mr Dunlop had been a key adviser to Tory Prime Minister Margaret Thatcher at the time of the Poll Tax.

Mr Cameron said he believed Mr Dunlop had been involved in defence procurement when he worked for Mrs Thatcher. 

Labour's Tessa Jowell, who is to run for London Mayor, makes a suggestion but doesn't tell us whose garage.

Image source, PA

Big day on Saturday for Sadiq Khan, David Lammy, Tessa Jowell, Diane Abbott and Christian Wolmar.

Image source, Reuters

Speaking after meeting Nicola Sturgeon, David Cameron tells the BBC: "Let's make sure Smith is implemented in full." 

He says he will keep the commitment he made "to the people of Scotland". 

"Let's get that done first because it does create a really strong Scottish Parliament," he adds.

"Of course, if people want to make future proposals I'll look at them."

The prime minister again said he did not support full fiscal autonomy for Scotland - the responsibility for all areas of tax and spending except defence and foreign affairs - saying that it would mean £7bn of cuts or extra tax-raising.

Anyone who had a wager on Chuka Umunna becoming Labour leader could be forgiven for tearing their hair out after today's news. But here's some good tidings - apparently bookmaker Paddy Power will refund all those who have had a punt on the shadow business secretary. The firm is now making Andy Burnham their clear favourite in the Labour race, by the way. 

The World at One
BBC Radio 4

Labour MP Lucy Powell, who was the party's campaign co-ordinator, says it was a "real shock" to hear the news about Chuka Umunna - a huge talent with great charisma. She acknowledged it must have taken great courage to step down and was a shame for the party and for the country. Life in modern politics, she says, is "incredibly difficult" on you and your family. "He is in a fairly new relationship and you have to go through that relationship together," she points out.

The BBC's Allegra Stratton has been speaking to Chuka Umunna. Newsnight's political editor says the Labour MP had not been enjoying his brief involvement in the leadership campaign and he feels "liberated" now he has withdrawn. Mr Umunna is likely to endorse someone in the next few weeks, she adds, and is hoping to play a prominent role in the party's frontbench team and in the EU referendum campaign going forward. 

The World at One
BBC Radio 4

Image source, Brian Wheeler

Mary Creagh, one of four Labour leader contenders still in the race, says she has "huge respect and affection" for Chuka Umunna, who's pulled out. He still has, she says, a huge role to play in Labour's future. Modern politicians, with social media, Facebook and emails, face pressures that people even 15 years ago did not face, she added. "You are expected to be a super counsellor and a super human", she says.

Asked where Labour went wrong in the election, she says people did not trust them on the economy nor did they feel their aspirations were understood.

BBC News Channel

Image source, BBC screen grab

As the Twitterari and media speculate on the background to Mr Umunna's withdrawal, George Eaton, political editor of the New Statesman, urges people to take his statement at face value. 

He cites the reasons as the scrutiny that his family and his girlfriend's family were under, as well as an instance where the press elbowed the pregnant Rachel Reeves out of the way to get to Mr Umunna as they were both heading into a shadow cabinet meeting. 

Mr Eaton suggests his withdrawal would benefit Liz Kendall more than any other contender as she appeals to New Labour figures or the "blue wing" of the party.

Did he think Mr Umunna could have won? His money's on Andy Burnham but Mr Umunna  - who has a "natural star quality" - had the potential to win, he says.

Image source, Labour party

In another leadership race - this one for London mayor - a new candidate has declared he will stand. Labour MP Gareth Thomas has thrown his hat in the ring and is calling for London to become a “city state” with greater devolution of powers, the Evening Standard reports., external

The MP for Harrow West and a former minister believes City Hall  - and Londoners themselves - should have more control over the services they depend on. 

He accuses Mayor Boris Johnson of “largely ignoring” the poorest parts of the capital which include some of the most deprived wards in the country.

Thought the UKIP row had gone quiet for a couple of hours did you? Think again. It's just been stuck in the microwave and reheated.

UKIP leader NIgel Farage returning to UKIP headquaters earlier appears to have upped the ante too. 

He has told one member of his party - we don't know who it is but it has been widely noted that UKIP's only MP Douglas Carswell has refused to publicly back his leader - to put up or shut up.

He said: