Prime Minister Boris Johnson's interview with the BBC's Andrew Marr has now begun.

Mr Johnson says it is "ridiculous and repulsive" that someone as "dangerous" as London Bridge attacker Usman Khan was released from prison after "only serving eight years".

He tells Andrew Marr this why a Conservative government would change the law.

He says: "We are going to bring in tougher sentences for serious sexual and violent offenders...we are going to take action."

He blames the previous Labour government for the "automatic early release scheme" under which Khan was freed - but is being challenged on his assertions.

Shadow attorney general Shami Chakrabarti says "knee-jerk" legislation brought in after a terrorist incident is "rarely good legislation".

Responding to PM Boris Johnson's calls for tougher laws for convicted terrorists, she tells Andrew Marr: "It's very unedifying to be talking about knee-jerk legislation and throwing away keys.

"Legislation off the hoof, particularly after a terrorist atrocity is rarely good legislation."

Earlier this morning, Labour leader Jeremy Corbyn said the size of the Royal Family and the behaviour of its members is being "looked at".

Sophy Ridge now asks Foreign Secretary Dominic Raab if he thinks the size of the Royal Family should be reduced and he replies: "No I think it's crazy, we need to be respecting the institution of the monarchy.

"If Jeremy Corbyn is saying he wants to cut the numbers of the Royal Family, he should come out and say who he wants to cut."

Mr Umunna refuses to agree that the Lib Dem's close focus on revoking Article 50 in their election campaign was a "mistake".

He tells the BBC's Andrew Marr: "We are, under the current polling, winning or in second place in 134 seats.

"The public have a choice right now: either you can deliver a blank cheque to Boris Johnson to take us out of the EU, with the hardest of hard Brexits, with us trading us no deals terms with the EU from the end of next year, or you can ensure we have parliamentary arithmetic in the new House of Commons to deliver a People's Vote to stop Brexit altogether..."

Lib Dem candidate Chuka Umunna accuses the two main political parties of using Friday's stabbing attack at London Bridge as a "political football in their general election campaign".

Speaking to the BBC's Andrew Marr, he says: "I think people will be waking up this morning and finding it rather unedifying that the two main parties are seeking to use a terrorist incident..."

He adds we should be "drawing a line under the silly political games" over the incident and make sure it never happens again.

The Nato summit also came up in Dominic Raab's Sky News interview.

Boris Johnson is a "leading light" in supporting defence spending and keeping the military alliance together, the foreign secretary says.

In contrast, Jeremy Corbyn has been critical of the alliance, he claims.

"When it comes to keeping us safe it's not just what we're doing at a domestic level it's leading internationally and bringing our allies together and Boris Johnson is doing that," he adds.

In a pre-recorded interview with the BBC's Andrew Marr, Nato's secretary general is asked about comments made by French President Emmanuel Macron that the alliance is "brain-dead".

Jens Stoltenberg says, in fact, Nato is "strong, agile and very active".

His comments come ahead of the Nato summit taking place in the UK this week.

Back on the subject of the London Bridge attack, Foreign Secretary Dominic Raab says "no-one wants to see the politicisation of this".

He is asked about comments by the father of London Bridge attack victim Jack Merritt.

In a now-deleted tweet, David Merritt posted that his son "would not wish his death to be used as the pretext for more draconian sentences or for detaining people unnecessarily”.

Responding to the comments, Mr Raab says: "The question is who is going to make sure that the overriding priority is avoiding any unnecessary risk to the public?

"I think if you look at what we're saying on sentencing... it is the Conservatives who are saying we will stop at nothing to keep people safe."

Read more about Jack Merritt.

The Foreign Secretary Dominic Raab turns the conversation towards Brexit.

He says voting Conservative is the best option "if you want to get out of the paralysis we're in".

Image source, Sky

An urgent review of the licence conditions of people jailed for terror offences has been launched by the Ministry of Justice following Friday's London Bridge attack.

But when asked how many convicted terrorists are currently on the streets of London, Foreign Secretary Dominic Raab says he is "not sure of the total number".

Speaking to Sophy Ridge on Sky News he adds the government has boosted funding for counter-terrorism policing.

Image source, Sky News

Deputy Lib Dem leader, Ed Davey, speaking to Sky's Sophy Ridge says he is "alarmed" by the way the prime minister has responded to the attack at London Bridge.

"He seems to be politicising this at a time when we really should be thinking about the families," he says.

"Worse still he's misleading people about what the current law is.

"He's trying to say that there is earlier release now, but actually that was got rid of in 2012."

Read more about the row that has erupted about the early release of prisoners.

Mr Corbyn also confirms he would vote if there was to be a second EU referendum.

The Labour leader, who has pledged to hold a new poll if he becomes prime minister, has said he would remain neutral in a future Brexit referendum campaign.

But when asked if he will tell the public how actually voted, he replies: "You'll have to wait and see."

Asked whether he had done anything wrong when it came to the handling of anti-Semitism, Mr Corbyn says: "I wished our party had acted on it more rapidly at the very beginning and dealt with it at that point."

Asked why he would not apologise for anti-Semitism in Labour Party after being challenged about the issue earlier in the week, Jeremy Corbyn says: "We've made it very clear as a party. We apologise for and regret any degrees of anti-Semitism that anyone's suffered."

Mr Corbyn says he would be happy to meet US President Donald Trump - who will be in the UK this week for a Nato summit - "to have a chat with him about his designs on our health service".

He adds he has never met Mr Trump, but will "be happy" to have a discussion with him and "looks forward" to it.

He adds a future trading relationship with the US in the would not involve the UK "giving up" the NHS.

Jeremy Corbyn, who is being interviewed by Sophy Ridge on Sky, is being asked whether he supports a shoot-to-kill policy and questioned on whether he supports the police decision to shoot dead London Bridge attacker Usman Khan.

"I think they had no choice, they were stuck with a situation where there was a credible threat," he says.

"Its an awful situation for any police officer... to be put in."

Referring to his previous remarks about shoot-to-kill, he says: "The points I made in the past particularly in relation to Northern Ireland - this is going back quite a long way - was that there was a concern in Northern Ireland that the police were adopting a shoot-to-kill policy when it was possible to arrest people rather than shoot people."

He calls for more funding for prisons "so that prison officers are able to do their job", for psychological assessments of prisoners before they are released, and for the Parole Board to be involved in the release decision.

He says the UK needs a probation service "worthy of the name", arguing probation services have been partly privatised and are now "not up to scratch".

Image source, Sophy Ridge on Sunday

Labour leader Jeremy Corbyn says convicted terrorists should "not necessarily" serve their full prison sentences automatically.

It comes after Prime Minister Boris Johnson said violent offenders "must serve every day of their sentence, with no exceptions".

In an interview recorded on Saturday, he told Sky's Sophy Ridge there are lessons to be learned from the London Bridge attack and there should be a "full investigation" into the circumstances around Usman Khan's prison sentence and subsequent release.

If you're just waking up to our live coverage, here's a quick refresh on the stories that have happened in the last few hours.

An urgent review of the licence conditions of people freed from prison after being convicted of terror offences has been launched by the Ministry of Justice following Friday's London Bridge attack.

PM Boris Johnson claimed scrapping early release would have stopped him.

But Labour leader Jeremy Corbyn will blame budget cuts for "missed chances to intervene" in a speech on Sunday.

You can read the full story here.

Elsewhere, the Labour Party has announced plans for a central online booking system for train tickets.

The party wants to replace what it sees as a confusing system of sales by private train operators - with around 55 million types of fare available.

Instead, it is proposing a "one-stop shop" for fares with no booking fees if it wins the election on 12 December.

The proposal is part of broader plans by the party to nationalise the UK's train system.

You can read more about the plans here.

This Sunday we'll be bringing you live coverage of the morning political programmes as well as updates on the investigation into the stab attack at London Bridge.

• The day’s political programmes kick off now with Sky's Sophy Ridge on Sunday, who will speak to Labour leader Jeremy Corbyn, Foreign Secretary Dominic Raab, deputy Lib Dem leader Sir Ed Davey, and campaigner Gina Miller
• Andrew Marr will be interviewing Prime Minister Boris Johnson in the wake of the knife attack
• He will also speak to Labour's shadow attorney general Shami Chakrabarti and Lib Dem shadow foreign secretary Chuka Umunna.
• NATO Secretary General Jens Stoltenberg will also sit down with Marr
• Lib Dem leader Jo Swinson is expected to talk to appear on Pienaar's Politics on BBC Radio 5 Live
• Lastly, at 19:00 GMT tonight there is an ITV debate, featuring representatives from the main political parties