By Diane Cooke
While Donald Trump, Theresa May and Emmanuel Macron were slapping one another on the back for a job well done, UK Labour leader Jeremy Corbyn was incensed that Britain joined the sortie on Syria without parliamentary approval.
Mr Corbyn has refused to blame the Assad regime, suggesting that “other parties” had access to chlorine gas and could not be ruled out.
Nevertheless, President Macron has asserted that he has "proof" that chlorine gas was used by Assad's regime, although gave no details on France's analysis of the attack.
In Washington, Defence Secretary Jim Mattis said the United States did not have complete information about what occurred in Syria.
As a result Mr Corbyn has called for a war powers act that would stop Theresa May from launching bombing raids without first consulting MPs.
The Labour leader said the prime minister should have strived for parliamentary approval before instigating UK involvement in air strikes on Syrian targets.
And he called for a proper debate in parliament today, concluding with a vote on action in Syria.
Britain, along with the US and France, hit chemical weapons facilities in a series of raids on three sites during the early hours of Saturday after civilians were targeted in Douma.
Prime Minister Theresa May has insisted the military action was "right and legal". Foreign Secretary Boris Johnson said the world had "finally" said "enough is enough" as he defended the "proportionate" strikes.
But Mrs May's decision not to seek a vote in Parliament beforehand has provoked criticism.
Scotland's First Minister told Sky News it was a "serious mistake" for the UK's role in Syria to be altered without Parliament's backing.
Nicola Sturgeon called for a full Commons debate as well as a commitment that any further action must be authorised by MPs.
The global chemical weapons watchdog said it will go to Douma "shortly", but it's unclear how much evidence might remain.