Much of today's conversation has been about Jeremy Corbyn's failure to say Labour is committed to the Trident nuclear weapons programme.

A Labour party spokeman has said it remained official policy to keep the deterrent. 

Here's a reminder of what exactly Trident is.

Image source, MOD

It's been a busy Sunday in the world of politics. 

Here's a recap of the main developments so far today:

• Labour has said it still backs the UK's Trident nuclear weapons after Jeremy Corbyn said "all aspects" of defence would be reviewed if he won power.  
• A cap on household energy bills looks set to be included in the Tory manifesto.
• UKIP will pledge in its manifesto to ban burkas worn by some Muslim women
• Lib Dem leader Tim Farron, external rules out post-election coalition deals
• Plaid Cymru leader Leanne Wood says she is "coming down against" standing as MP for Rhondda
• The leader of the Women's Equality Party is to stand against "male rights" MP

Scott Cato has said there needs to be a "real focus" on big companies which are avoiding paying tax.

She says the UK needs to have "European co-operation" to make this happen and the law should be changed to ensure people cannot "move their profit from country to country".

Green MEP Molly Scott Cato has said her party would consider "higher taxes for the better off" to increase NHS funding and roll back cuts to local council spending.

She told the Sunday Politics programme that while she "wasn't clear on the precise income", she suggested those earning £100,000 would "pay a little bit more" and those on £150,000 "quite considerably more".

It's a busy weekend for many MPs who have been spending time out in their constituencies.

Labour MP for Wolverhampton North Emma Reynolds tweeted this photo of her new baby boy Theo on the campaign trail.

Here's a recap on the Conservative election expenses row in a handy Q&A.

On the Sunday Politics programme, Tory party chairman Patrick McLoughlin defended his party's spending in the last general election.

You may recall the Conservatives were fined a record £70,00 for breaking election expenses rules in March.

Andrew Neil pointed out some MPs in the party have also been investigated by the police over election spending.

Mr McLoughlin said the party believed it had "fully complied with the electoral law as it was".

He would not be drawn on what would happen if any of the MPs being investigated were charged.

UKIP leader Paul Nuttall has been visiting a St George's Day event in Vauxhall, south London today. 

You might recall that Theresa May has said she will not take part in TV debates ahead of the general election.

A petition, external has been set up demanding the prime minister takes part in a debate alongside the other leaders of the UK's main political parties.

The number of signatures has now hit 112,000.

The Sunday Politics programme comes to us at the later time of 15:15 BST today. 

The Guardian's political editor has also been tweeting about Tony Blair's comments on the World at One.

Earlier, we tweeted about Labour MP Dan Jarvis nearing the end of the London Marathon. 

Now the former army major has finished the race.    

The World at One
BBC Radio 4

Pressed further on whether he might stand in one of Labour's vacant seats, Mr Blair sidesteps the question, saying: "I fancy doing whatever I can to at least make this debate in the election into a proper debate." 

He adds that he has never seen political poll leads of the kind the Conservatives currently enjoy over Labour, saying "there is almost something constitutional going on here". 

Responding to the point that Labour had a landslide victory in 1997 when he was leader, Mr Blair adds: "Let's be very clear, I was winning a landslide with very centrist policies at the heart of it and without an issue of the importance of Brexit dominating the debate."   

The World at One
BBC Radio 4

Earlier, former prime minister Tony Blair told the World at One that he felt so passionate about Brexit that he was almost tempted to return to British politics.

He told Mark Mardell: "I look at the British political scene at the moment and I actually almost feel motivated to go right back into it. 

"We're just allowing ourselves to be hijacked by what is actually quite a small group of people with a strong ideology."

Separate to the election, Labour MP Dan Jarvis has been taking part in today's London marathon. Someone tweeting on behalf of the former army major said he was just one mile from the finish line. 

Image source, Reuters

Earlier, UKIP leader Paul Nuttall told the Andrew Marr Show that he would decide whether to stand as an MP in the coming week. 

UKIP currently has no MPs after Douglas Carswell quit the party in March.  

Mr Nuttall unsuccessfully stood for election in the Stoke-on-Trent Central by-election in February, coming second.

"I will make a decision in the coming week about where to stand, obviously I'll be having conversations with local branches," he said. 

"Nothing is decided."