Tri-Service
Syria Debate: The Arguments
A week is a long time in politics - and the last seven days of political wrangling over whether to conduct airstrikes in Syria has proved that.
The last time MPs voted on possible military action in the country was in 2013. Back then the target was the Assad regime - this time it's the so-called Islamic State.
Last week David Cameron set out his seven-point plan on military action in Syria to the House of Commons, making it clear he wouldn't hold a vote unless he was confident he would win.
Today, he argued that extending British military action to Syria will "keep British people safe". Just click above to see the key points of today's debate in the Commons.
Democratic Unionists and the Liberal Democrats are also backing air strikes, whilst the majority of Conservatives are expected to vote in favour of action.
But the Prime Minister's argument for action was dismissed by Labour leader Jeremy Corbyn as an "ill thought-out rush to war" that public opinion is "moving increasingly against".
Mr Corbyn, for his part, has the support of the majority of his MPs but up to half of his Shadow Cabinet may vote in favour of bombing, with the party having been given a free vote on the issue.
The SNP, meanwhile, says it "cannot support the government" in extending airstrikes.
Angus Robertson, the SNP's leader at Westminster, said the government "may well win the vote tonight, but will do so with only the support of two out of 59 Scottish MPs."
Forces TV's audience, meanwhile, is strongly in favour of extending airstrikes to Syria - find out more here.
More from Forces TV: Are Air Strikes Alone Enough To Defeat IS?