Up to 100 Labour MPs will back David Cameron on Wednesday as he formally calls for a debate and vote in Parliament on whether to launch military air strikes against Isil jihadists in Syria. At a meeting of the Cabinet in Downing Street, the Prime Minister will tell his ministers that Isil pose a “direct threat” to national security and that he believes he has the numbers required in the Commons to endorse an intervention. If, as expected, the vote is passed, British bombers will begin launching attacks on Syrian targets within hours. Mr Cameron’s decision to go ahead with a vote in Parliament came after Jeremy Corbyn, the Labour leader, today agreed to offer his MPs a free vote on the issue following a rebellion of his shadow ministers. It is believed that as many as 100 Labour MPs will now back the Government’s plans for air strikes. “I am confident that when we bring this matter to a vote in Parliament we will now see a majority of parliamentarians supporting the action.” Philip Hammond Fewer than 10 Conservative MPs are expected to oppose strikes after becoming convinced of Mr Cameron’s arguments in favour of action, it is understood. Speaking on Monday night, Mr Cameron said: “As I said last week, the decision to take military action is one of the most serious a Prime Minister can make. “Tomorrow, I will be recommending to the Cabinet that there be a debate and vote in the House of Commons on a motion to participate in coalition air strikes against ISIL in Syria.” The Prime Minister added: “Isil poses a very direct threat to the United Kingdom – and as we have already seen in Iraq, British air strikes can play a key role in degrading them; but they are only part of a comprehensive strategy for Syria. “This strategy must include the international community working together to find a political solution to the turmoil in Syria; a continuation of our extensive humanitarian efforts; and a clear commitment to post-conflict reconstruction of Syria.” Mr Corbyn has called on Mr Cameron to delay the vote until at least next week because he has failed to answer a number of questions put to him by those not in favour of air strikes. He has also called for a two-day debate on the issue. However, senior allies of the Prime Minister strongly indicated that he wants to hold the vote this week. Mr Cameron has repeatedly said that each day “wasted” in not joining the military action is allowing Isil to grow and plot more attacks on European countries. Philip Hammond, the Foreign Secretary, said: “I am confident that when we bring this matter to a vote in Parliament we will now see a majority of parliamentarians supporting the action.” He added: “The equipment to be deployed will be determined by military considerations and may vary from time to time but broadly speaking we are expecting to increase the deployment of Tornados that we have already deployed to Akrotiri and supplement it with a deployment of Typhoon Eurofighter aircraft." Outlining what Britain could bring to air strikes, Mr Cameron said: "We have the Brimstone precision missile system, which enables us to strike accurately with minimal collateral damage – something that even the Americans do not have. "The Raptor pod on our Tornado aircraft has no rival currently gathering 60 per cent of the Coalition’s entire tactical reconnaissance in Iraq, while also being equipped for strikes. "In addition, our Reaper drones are providing up to 30 per cent of the intelligence in Syria but are not currently able to use their low collateral, high precision."