UK Prime Minister David Cameron has taken to a below the belt offensive against Opposition leader Jeremy Corbyn whom he has described as a 'terrorist sympathiser' in an effort to win a vote in Parliament to bomb Isis in Syria.

Cameron has asked Conservative MPs to give him an overall parliamentary majority in favour of military action in Syria and warned them against voting with "Jeremy Corbyn and a bunch of terrorist sympathisers" against the motion, according to The Guardian.

Cameron is fearful that backbench Labour MPs may not back his move and so he is desperately hoping to rally Tory MPs and keep their votes together so that he doesn't have to depend on any other votes and can prove that he has a clear consensus on his Syria mission.

"You should not be walking through the lobbies with Jeremy Corbyn and a bunch of terrorist sympathisers," the prime minister reportedly told the 1922 committee, said The Guardian.

His remarks, echoing a similar attack on Corbyn at the Tory conference in October, were confirmed to the Guardian by a senior MP who attended the meeting.

Cameron is furious because Labour leader Corbyn has suggested that the former is dragging Britain into a mire in Syria wiht his "bomb first, talk later" approach. In a recent Guardian article, Corbyn asked Labour MPs to think of the "terrible consequences" of the wars in the Middle East over the past 14 years.

"David Cameron ... knows that opposition to his ill-thought-out rush to war is growing," Corbyn wwrote.  "On planning, strategy, ground troops, diplomacy, the terrorist threat, refugees and civilian casualties, it's become increasingly clear the prime minister's proposal simply doesn't stack up.

"Cameron's approach is bomb first, talk later. But instead of adding British bombs to the others now raining down on Syria, what's needed is an acceleration of the peace talks in Vienna," he wrote.