Nigel Evans, MP for Ribble Valley, is another Conservative to offer his support to David Cameron for launching air strikes in Syria.

Graham Allen, from the Labour benches, says the UK must learn the lessons of Iraq, Afghanistan and Libya and "not to go in on a tactic and make up the strategy as we go along". He stresses the importance of an international coalition, including Assad, Turkey and Russia, to building a long-term solution to the crisis.

David Cameron says Assad can't be a part of that coalition because his "barrel bombs" on Syrians have driven people towards IS.

Conservative Sir Edward Leigh, says that while the PM has made a "convincing" case, one was also made about the Iraq War in 2003.

He takes issue with the PM's claim that 70,000 Syrian opposition fighters could lead the ground fight against IS, saying it was "the weakest part" of his argument, and warns:

David Cameron concedes that the issue of ground troops "is probably the most difficult argument", but urges MPs not to "underestimate" that the free Syrian Army forces are there.

He also appeals to MPs to "separate" the Iraq War from this case.

Conservative MP for Totnes, Sarah Wollaston, tells the Commons she has changed her view since 2013, when she voted against bombing Syria, and now supports military action.  

Home Affairs Committee chairman Keith Vaz says an "inevitable consequence" of bombing Syria will be a worsening of the migrant crisis and asks whether the rest of the EU is ready for this. He also asks the PM to meet Muslim leaders to explain the case for air strikes. 

David Cameron says a political solution in Syria will improve the refugees crisis - and that air strikes will help bring this about. On Mr Vaz's last point, he says he'll look at the idea.

He was responding to the SNP's Philippa Whitford, who said she was anxious this was a "something must be done" response, and warned it could boost recruitment of extremists here.

Plaid Cymru's Hywel Williams, recalling the Iraq War vote, tells David Cameron that before he seeks Commons approval on bombing Syria "he should examine his conscience and all choices short of bombing".

David Cameron tells him there 's "no part" of him that wants to take part in any military action "that I don't believe is 100% necessary for our own safety and security. That's what this is about". He says the Iraq War must not put MPs off from making these decisions.

Bob Stewart, a former British commander in Bosnia, says the Commons should press ahead with a vote on Syria air strikes next week, saying the UK's allies "want us to prove we are fully with them".

"Enemies to the right of us, enemies to the left of us. Keep out." That's Dennis Skinner, the Labour MP for Bolsover's view of proposed UK bombing of IS in Syria.

Conservative MP John Baron warns there's a danger of "repeating the errors" of the Iraq and Afghanistan wars, and the intervention in Libya. He urges the PM to look again at his figure of 70,000 Syrian opposition fighters, saying there are "very few moderates" remaining on either side of the Syrian civil war. He adds:

David Cameron responds that there are "too many terrorists threatening our country".

Labour MP Paul Flynn claims David Cameron is ignoring IS's aim to "escalate a regional war into a world war between Christians and Muslims". He warns that the 2003 Iraq conflict "deepened that divide" and says bombing Syria will make it worse. David Cameron says IS has to be stopped and the UK should play its part.

Nigel Dodds, the Westminster leader of the DUP, says Northern Ireland knows the consequences of “appeasing and indulging terrorism”. He tells the prime minister: "We stand ready to do what is in the best interests of national security."

Conservative backbencher Nadine Dorries imagines if the Paris attacks had happened in Britain, and says the public would be outraged if the UK's allies "proscratinated" in this way over whether to support us.

She suggest to the PM that the government chief whip should gain assurances from Labour whips that enough of its MPs will back military action, to ensure the air strikes go ahead.

Labour leader Jeremy Corbyn has indicated his opposition to intervention, but some of his MPs are likely to back the move. He is under pressure to give them a free vote.

Peter Lilley, Conservative, says he wants convincing there is "a moderate group that we can back" in Syria and says that "if" the 70,000-strong forces exist will they actually act against the Islamists, when last time, in 2013, he "wanted and expected" them to act against President Assad.

Mr Cameron insists there are moderate forces. He says most Syrians want a pluralist country and they "deserve our support".

Lib Dem leader Tim Farron's opening statement is greeted with murmurs in the Commons, after he warns against "knee-jerk responses on both sides" to the Paris attacks.

David Cameron says he's determined there should be "no knee-jerk reaction", adding that he wants Parliament to consider his case and think it through.