week and the indications are that dozens of opposition Labour MPs rebelling against their party leader could swing a subsequent vote in his favour.
"What’s going on in the world matters to the United Kingdom, so we should be helping to shape it and with today’s announcement we can do just that," Cameron said during a visit to a Royal Air Force base in west London, referring to a boost in military budgets.
"I’ll be making a statement in parliament later this week where I will set out in full our strategy for combatting ISIL, both in Iraq and Syria," he said, using a term for the Islamic State group, which has claimed responsibility for the Paris attacks.
Cameron earlier on Monday visited Paris, where he met President Francois Hollande and paid homage to the 130 victims of the November 13 shootings and bombings outside the Bataclan concert venue where 90 of them died.
In a speech to parliament later on Monday, Cameron is expected to pledge an extra £12 billion ($18.2 billion, 17.1 billion euros) for the military to act against threats including the Islamic State group.
The five-year Strategic Defence and Security Review (SDSR) will include measures such as the creation of two new 5,000-strong rapid reaction strike brigades which will be available for global deployment at short notice by 2025, officials said.
Writing in Monday’s Daily Telegraph newspaper, the prime minister said: "As the murders on the streets of Paris reminded us so starkly, Islamic State is not some remote problem thousands of miles away; it is a direct threat to our security."
While British forces are taking part in air strikes on IS targets in Iraq, they are not involved in the international effort targeting Syria due to resistance from opposition parties still mindful of unpopular interventions in Iraq and Afghanistan.
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