That's all for our coverage today. It is likely to be another busy day tomorrow, with David Cameron expected to make a statement to Parliament on the outcome of the weekend's G20 summit in Turkey, which was dominated by the Paris attacks. There are several other government announcements in the offing as well. Please join us then. 

The prime minister concludes his speech by referring to the "Blitz spirit" which the British people showed when they came under lengthy and persistent attack during World War Two, noting his predecessor Sir Winston Churchill's refusal to negotiate with the enemy "however long and hard the toil may be". 

David Cameron takes a thinly-veiled swipe at Labour leader Jeremy Corbyn, saying foreign policy is about building alliances, not "press releases and pious statements in Parliament". 

He says it was naive to argue, as Mr Corbyn did, that the British jihadist Mohammed Emwazi, thought to have been killed in a US drone strike on Friday, could have been detained and brought to trial. 

There is no legitimate government in Syria to facilitate this, and certainly not in the area controlled by Islamic State where Emwazi was targeted, he added.

The more we learn about what happened in Paris, the PM says, the more he is adamant the government's counter-terror approach in recent years is justified. 

He says a comprehensive approach to tackling terror is needed, encompassing military force, counter-terror expertise and defeating the "poisonous narrative that is the root cause of this evil". 

Mr Cameron says Islamic extremism cannot be explained by poverty, deprivation or foreign interventions in Iraq and other Muslim countries. Instead, he argues, it stems from a "diseased view of the world" and the UK and other countries have to stop "the seed being planted in the minds of young people" by arguing for an alternative philosophy based on the liberal values of compassion, diversity and tolerance. 

Speaking at the Lord Mayor's banquet at the London Guildhall, David Cameron has said France, the UK and its allies will never be "cowed" by "acts of depravity" like those seen in Paris and will "redouble our resolve" to fight terror in all its forms. He announces increased funding for the security services, fighter aircraft and a doubling of the UK's drone capacity. He also says the international aid budget will be refocused, with half of it targeted on stabilising broken states.

Reports have been coming in about what happened at this evening's meeting of the Parliamentary Labour Party. Here's a flavour. 

Shadow Chancellor John McDonnell has written to George Osborne, external offering Labour's support in implementing the prime minister's announcement of extra resources for the security services. David Cameron has said MI5, MI6 and GCHQ will get a 15% increase in their funding to recruit an extra 1,900 operatives. While calling for an urgent review of police budgets in the letter, Mr McDonnell offers his backing in terms of the extra expenditure earmarked for the security services.

A quick summary of the day's events as France, the UK and other governments take measures in response to the deadly Paris attacks. 

• People in France and around Europe observe a minute's silence to remember the victims of Friday's terror attacks in Paris.
• The French President Francois Hollande has vowed to destroy so-called Islamic State saying his country is at war.
• M Hollande has promised to double the number of security personnel and called for new powers for the government to declare a state of emergency for up to three months.
• In the UK, Home Secretary Theresa May has announced funding for 1,900 new security personnel to combat terrorism, while telling MPs in the House of Commons that France "does not grieve alone".
• Meanwhile, Prime Minister David Cameron has said the UK will not join France in carrying out air strikes in Syria at the present time without the backing of MPs in the House of Commons for military action in the country.
• Labour leader Jeremy Corbyn will face his own MPs later today to agree his party's position on possible air strikes. But Mr Corbyn says he remains to be convinced that military action is the answer to Friday's terror attacks in Paris.
• Mr Corbyn has called for a political solution to the civil war in Syria and echoed the sentiments of President Barack Obama at the G20 summit in Turkey. 
• Mr Obama ruled out further military action in Syria adding he was not prepared to send ground troops into the country adding the only way to defeat so-called Islamic State was by finding a political solution to the conflict in Syria.

• French security services have carried out more than 150 raids in various locations around the country, recovering 38 weapons. More than 100 people have been placed under house arrest.
• David Cameron, who will make a major foreign policy speech in London, later, also reveals that British security services have prevented seven terrorist attacks in the last six months.

That's it from the day shift. We'll leave you in the very capable hands of Gavin Stamp to take you through the rest of the evening. 

The Duke of Cambridge will attend Tuesday's friendly game between England and France in his role as FA president out of "solidarity to the people of France", a royal source said. The BBC's royal correspondent Peter Hunt said Prince William wasn't scheduled to attend the Wembley match but decided to after Friday's attacks.

House of Commons
Parliament

Theresa May eventually sat down after answering more than ninety minutes of questions in the House of Commons this afternoon. Towards the end of the session she reiterated her message that people must continue with their normal way of life, whether it is going to Tuesday's France-England friendly match or other activities, or those who wish harm to the UK and other countries have effectively won. 

As a mark of respect for the French people and to express his solidarity for them, Conservative MP Sir Edward Leigh has spoken in French in the Commons, saying he hoped he was talking on behalf of all those in Parliament who loved the country.

In response, Mrs May thanked him and added: "Nous sommes tous ensemble". 

The Daily Politics

David Cameron has reiterated that he will not ask Parliament to vote on extending British military action into Syria until there is enough support.

Labour MP Chris Matheson spoke to Jo Coburn about whether he would support air strikes in the war-torn country.

Harriet Harman, former deputy leader of the Labour Party, has tweeted a speech of hers from June 1983. It was written not long after Labour had been defeated by the Conservatives in the 1983 general election. Is there something she is trying to tell the party?