British Prime Minister David Cameron will rally for cross-party support to authorize military action against the Islamic State, also known as ISIS or Daesh, following an appeal for aid from Iraqi Prime Minister Haider al-Abadi at the sidelines of the United Nations General Assembly on Wednesday.

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Cameron, who is up for re-election in 2015, said he intends to join the U.S.-led aerial attacks but would need to gain authorization on the action.

Cameron will hold a closed-door meeting with his Cabinet on Thursday to discuss the details of the proposal before parliament votes on Friday whether to allow Britain's Royal Air Force to launch attacks on targeted Daesh locations in northern Iraq.

The proposal is expected to pass smoothly.

Speaking at the UN General Assembly in New York, Cameron called for British action to protect its national interests and citizens from Daesh that he said adheres to a "sick extremist world view."

Initially, the idea of launching aerial attacks was not on the table, but the country's stance on the issue has been renewed in recent weeks, especially after the beheading of British citizen David Haines. Haines was kidnapped in Syria last year while working with ACTED, a French aid organization.

Cameron said the brutal murder of two American journalists and a British aid worker by a militant with an obvious British accent underscores the "sinister" threat it poses to London's security.

The prime minister has deemed the threat of returning British extremists from Iraq and Syria a national security.

Despite this, Cameron said the attacks would only target Daesh locations in Iraq.

Some officials have remarked that carrying out attacks in Syria without consent from the Syrian government would be illegal but Cameron said working with Syrian President Bashar al-Assad to destroy Daesh forces would be redundant.

Dealing with Syria would not defeat the Daesh because "Assad's regime was and is one of the most powerful recruiting tools for extremists," he said.

Ten years ago, Britain was quick to provide aid to longtime ally U.S. in Iraq and Afghanistan, but parliament's veto on military action against the Syrian regime last year has prompted Cameron to tread carefully and obtain authorization before acting.

TagsWar Conflict, Fertile Crescent, politics, david cameron, ISIL, Daesh