Syria news latest: Trump and May join forces as Cabinet agree 'poison gas attack' should not go unchallenged

Theresa May and Donald Trump agreed to work towards a response to suspected poison gas attacks in Syria as speculation over possible air strikes continued. 
Mrs May’s Cabinet had unanimously backed her warning that Syria’s use of chemical weapons should not be ignored, clearing the way for possible military action.
In a phone conversation after the Prime Minister's emergency Cabinet meeting, Mrs May and the US President pledged to work together on the international response.
They said there was a need "to deter the further use of chemical weapons by the Assad regime".
Downing Street said ministers had agreed it was "highly likely" Syrian President Bashar Assad was responsible for the attack on Douma that reportedly left dozens dead on Saturday.
Cabinet meeting: Theresa May set out the case for airstrikes in Syria (AP)
It said there had been agreement around the cabinet table that such actions should not go "unchallenged" and that the UK would continue to work with the US and France to co-ordinate an international response.
The US president was also due to hold further talks with French president Emmanuel Macron, after a meeting of his national security team ended without a "final decision" on how to respond to events in Syria.
The largest US air and naval strike force since the 2003 Iraq war was said to be heading towards Syria, according to reports in The Times, paving the way for strikes within the next three days.
Separate reports by US media said President Trump was considering striking eight Syrian targets, including two airfields, a research centre and a chemical weapons facility.
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The statement released by Downing Street after Thursday's Cabinet meeting made no direct reference to military action, but will be seen as a signal Britain would be prepared to join any US-led air strikes against the regime should the Americans decide to go ahead - putting it on a potential collision course with Assad's principal backer, Russia.
Russia has called for the United Nations Security Council to meet on Friday for fresh discussions on Syria.

In a statement released on Thursday night, a Downing Street spokeswoman said: "The Prime Minister spoke to President Trump about Syria this evening.
"They agreed that the Assad regime had established a pattern of dangerous behaviour in relation to the use of chemical weapons.
"They agreed it was vital that the use of chemical weapons did not go unchallenged, and on the need to deter the further use of chemical weapons by the Assad regime.
"They agreed to keep working closely together on the international response."
Earlier, President Trump appeared to row back from a suggestion on Wednesday that missile strikes were imminent, insisting in his latest tweet that he had never set out a timetable for military action.
"Never said when an attack on Syria would take place. Could be very soon or not so soon at all!" he wrote.
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US broadcaster NBC quoted US officials familiar with the intelligence as saying they had now obtained blood and urine samples which had tested positive for chemical weapons.
That assessment appeared to echo President Macron, who said they had "proof" that "at least chlorine" was used in the attack by the regime.
Attack: Image released by Syrian Civil Defense White Helmets shows a child receiving oxygen following an alleged poison gas attack in Douma (AP)
The White House said it was still assessing the evidence after its security council meeting on Thursday.
The No 10 statement issued following the Cabinet meeting said Mrs May had again described the attack on Douma as a "shocking and barbaric act" which represented a further erosion of international law.
"Cabinet agreed that the Assad regime has a track record of the use of chemical weapons and it is highly likely that the regime is responsible for Saturday's attack," it said.
"Following a discussion in which every member present made a contribution, Cabinet agreed it was vital that the use of chemical weapons did not go unchallenged.

The statement made no reference to whether Parliament would be given a say on military action - prompting renewed concerns among opposition parties and some Tory MPs that Mrs May is prepared to go ahead without a Commons vote."Cabinet agreed on the need to take action to alleviate humanitarian distress and to deter the further use of chemical weapons by the Assad regime."
Labour leader Jeremy Corbyn insisted that MPs were entitled to a vote, saying Parliament "must be consulted".
Ken Clarke, the Conservative former chancellor, Liberal Democrat leader Sir Vince Cable and Ian Blackford, leader of the SNP in Westminster, also urged Mrs May to give MPs a vote on military action.
A team from the Organisation for the Prohibition of Chemical Weapons is due to start its investigation in Syria on Saturday.
On Friday campaigners from the Stop the War Coalition will hand in a letter signed by MPs, trade unionists, celebrities and academics to Downing Street urging Mrs May to not take military action in Syria.