David Cameron has told a press conference at G20 there has been agreement to take steps to cut terrorist financing and counter extremist ideologies.

Victoria Derbyshire

Powerful automatic weapons that have largely been associated with marauding attacks like the one in Paris on Friday have been something that the UK has been spared,the BBC's security correspondent Frank Gardner tells the Victoria Derbyshire programme. That's in part thanks to the tight gun ownership laws that exist in Britain. But the UK is not immune to terrorist attacks and it is only by staying vigilant that the UK will avoid them, he adds. 

Alex Salmond, the former SNP leader, has paid tribute to those who died in the terror attacks in Paris.

He says "The music stopped on Friday the 13th. It was that the day the music died and many, many French citizens died with it."

He says so called Islamic State should be referred to as Daesh as "it is not an Islamic State, it is a terrorist organisation. An organisaton whose only judicial system is barbarism".

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A French official has identified the suspected mastermind behind Friday's terror attack on Paris as Belgian Abdelhamid Abaaoud, and says he is believed to have links to the thwarted attacks on a Paris-bound high-speed train and Paris area church. That's according to a report by Associated Press.

Downing Street sources have said that security services prevented one attack in the UK in the last month.

Earlier today the Prime Minister said that seven attacks were prevented in the last 6 months.

The French ambassador to the UK has said her country would like the UK to join France in joint military action in Syria. 

When asked whether there was a French desire for Britain to take part in air strikes, she told Good Morning Britain: "Well, if it's the case, we would of course appreciate to be with our closest allies in Syria as well as in Iraq but I understand there is a decision to be taken here, in particular in the Parliament." 

It has also emerged that a rocket launcher was discovered in Lyon earlier this morning as police raids stepped up after the attacks.

As well as an increase in funding for British intelligence agencies - enabling an increase of about 15% in staffing - the government is set to agree a doubling in funding for aviation security this week.

It is expected to be used to pay for more experts to assess airport safety in countries with large numbers of British visitors, among other measures.

Belgian police have carried out a new raid in the Brussels district of Molenbeek according to state broadcaster RTBF. The district of Molenbeek has been at the centre of investigations of militant attacks in Paris over the weekend, after it emerged that two of the attackers had lived in the area.  

David Cameron, responded to comments made by Russian President Vladimir Putin saying "it is clear to me that we must work together to defeat this scourge of terrorism that is a threat to Britain, a threat to Russia and a threat to us all". 

The two leaders met at a G20 summit being held today.

Mr Cameron went on to say "I'm sure we can discuss that and the situation in Syria this morning. And as you say there's an opportunity to talk about our bilateral relationship as well."

Russian President Putin says there are a "lot of issues at the bilateral level" and he says the relationship with the UK at the moment was "not of the best". But he adds there is an "opportunity to discuss urgent international problems".

President Putin and Prime Minister David Cameron met at the G20 summit.

More from the Paris prosecutor: Samy Amimour, one of the suicide bombers at the Bataclan, was known to French intelligence services.

He was placed under a formal investigation in October 2012 for terrorist conspiracy after it emerged that he planned to go to Yemen. 

He was placed under judicial supervision and an international arrest warrant was issued against him when he broke the conditions of his bail in autumn 2013. 

Three of Amimour's relatives were detained on Monday morning.

On ITV's Lorraine show, Labour leader Jeremy Corbyn questioned what he saw as a lack of coverage in the western press of attacks in Lebanon and Turkey last week. "Our media needs to be able to report things happening outside Europe as well as inside Europe; a life is a life," he said.