David Cameron has set out his detailed case for British airstrikes against Islamic State (IS) in Syria as part of a "comprehensive" strategy to tackle the group.

:: What is the plan?

The Prime Minister broke his approach down into seven points, aiming to address concerns raised by the Foreign Affairs Committee in a report earlier this month.

They included building international support to end the civil war and begin a "transition" from Bashar Assad's regime, as well as boosting Syrian groups fighting IS and cutting off the terrorists' funding streams.

But Mr Cameron rejected the idea that the UK should wait for these efforts to come to fruition before attacking strongholds such as Raqqa.

He said the UK could add to the coalition's military capabilities with Brimstone missiles and "dynamic targeting" on Tornado aircraft.

Mr Cameron also reassured MPs that he only wanted the RAF to attack IS targets - in contrast to two years ago, when the Government lost a vote that would have authorised strikes on Assad's forces.

:: How did MPs react?

The Commons generally raises the tone when national security issues are at stake, and today was no exception.

There was a measured and respectful debate lasting more than two and a half hours, with 103 MPs asking questions of the PM.

The SNP's leader at Westminster, Angus Robertson indicated that his party was likely to oppose the military action.

Labour leader Jeremy Corbyn warned of "unintended consequences" from airstrikes, but stopped short of saying he would oppose them.

A number of Tories who had previously voiced reservations about extending action seemed to have been won over - including crucially the Foreign Affairs Committee chairman Crispin Blunt.

However, other speakers doubted Mr Cameron's claim that there are 70,000 Syrian fighters on the ground and ready to battle IS.

:: So what happens now?

Mr Cameron made clear he was not setting a timetable for a vote - or even committing to hold one.

He said he would not bring the issue to the House if there was a chance of losing, for fear of handing IS a propaganda victory.

Government Whips are thought to have pencilled in Tuesday and believe they would have enough support to carry the day, as the DUP and more than 20 Labour MPs have signalled they are ready to endorse action, offsetting any Tory rebels.

However, the position of the Labour leadership - and whether they grant their MPs a free vote - could be crucial.

:: What will Mr Corbyn do?

The shadow Cabinet held a 90-minute meeting after Mr Cameron's statement to discuss its approach, without coming to any firm conclusion.

Members have now been sent away to consult with their constituency parties and consider over the weekend, before meeting again on Monday ahead of a potentially explosive Parliamentary Party session in the evening.

It appears very unlikely that Mr Corbyn will be able to unite his team on a single position. He and shadow chancellor John McDonnell have already indicated they oppose Western military involvement in the Middle East, while a number of other senior figures are thought to be in favour of targeting IS in Syria.

That would leave Mr Corbyn with a choice between ordering his MPs to vote against - raising the possibility of a hugely damaging rebellion - or allowing a free vote and admitting his team cannot agree on a key matter of national security.