Jeremy Corbyn urged to give MPs free vote on air strikes

However, Labour leader Jeremy Corbyn said he opposed the strikes but he had not decided whether to give his MPs a free vote.

In addition, the Momentum group of Labour activists, set up to help Corbyn, was lobbying Labour MPs intensively.

“ISIS is as strong as it was before the bombing started and also we have the record of 14 years of bombing, and every single country we have bombed, the wars are still going on there”, said Lindsey German, of Stop the War, during the demonstration.

Although a free vote would spare Corbyn the ignominy of large numbers of Labour MPs defying the whip, such a scenario would further undermine his leadership.

Ahead of a crucial Labour Party meeting on the issue, Murray told Scotland on Sunday the vote “must be above narrow party politics”.

Many senior figures in the party support the expansion of attacks, meaning that a vote would divide Labour.

Protesters are gathering across London to demonstrate against an escalation of United Kingdom military intervention in the Middle East.

The row was triggered by Corbyn’s decision on Thursday to release a letter saying he could not support RAF air strikes in Syria – seen by some MPs as an attempt to pre-empt Monday’s meeting.

She said: “There is no shortage of countries bombing Syria, what there is a shortage of is people trying to get a ceasefire on the ground amongst the non-Daesh combatants and unify in the action against them”.

Around 5,000 people also took to the streets in Madrid to protest against possible military action in Syria.

Mr Galloway told the crowd: “We broke Iraq into a hundred pieces, a million are dead, and fanatic extremism is cascading all over the world”.

“We’ve had adventures in Iraq and Afghanistan”, he added, referring to Britain’s role in previous conflicts.

Actor Mark Rylance, former Respect MP George Galloway and musician Brian Eno were among those to address the demonstrators who waved placards and chanted: “Don’t bomb Syria” in Whitehall, central London.

Britain shouldn’t stand by while other countries confront Islamist terrorism, and bombing is one of the requirements for destroying the “death cult” of Islamic State, he said. “We’ve tried this way before”.

It will note that the resolution backs states to take “all necessary measures” to prevent terrorist acts by IS and to “eradicate the safe haven they have established over significant parts of Iraq and Syria”.

“Jeremy Corbyn has a clear mandate to lead Labour because more than 59 per cent of the votes cast were for him”, she said.

Cameron, who lost a vote on air strikes against Syrian President Bashar al-Assad’s forces in 2013, needs to persuade several lawmakers in his own Conservative Party and some in the opposition Labor Party to back his cause if he is to win parliament’s backing for military action.