Opposition leader Jeremy Corbyn has slammed Premier Theresa May for not consulting the parliament before allowing the British military to join the US and France in carrying out coordinated airstrikes in Syria.
As Russia's Defense Ministry reported, the attack lasted from 03:42 to 05:10 local time.
The prime minister spoke in Downing Street in the hours after the Saturday attacks and insisted the action was limited and targeted to degrade chemical weapons capabilities and deter the Syrian government from further attacks.
"This legally questionable action risks escalating further.an already devastating conflict".
Labour MP Kevin Brennan wrote: "Parliamentary approval should have been sought".
"America does not seek an indefinite presence in Syria", he said, thanking the United Kingdom and France for joining the USA in its fight against the Syrian regime.
"Today, the nations of Britain, France, and the United States of America have marshalled their righteous power against barbarism and brutality", Trump said.More news: Ex-Philadelphia Eagles player Daryl Worley charged after police tased, arrested him
"This extraordinary U-turn is an admission that the prime minister made an error in failing to recall parliament and is yet more evidence of how ill-considered this military action is - and just how far Theresa May's actions have been dictated by presidential tweet". However, that has been less the case in recent years.
Theresa May will pre-empt planned opposition motions by applying to the Speaker for a debate herself "to give the House an extended opportunity to discuss the military action".
David Cameron, who was prime minister in 2013, tweeted on Saturday: "As we have seen in the past, inaction has its consequences".
An important target for the strikes were Syrian military airfields, he added.
He said Britain had told the White Helmets, who act as first responders in rebel-held areas, to fake the suspected chemical attack in the town of Douma.
It returns from its break on Monday, when May will face MPs' questions on the strikes.
BBC political correspondent Ben Wright said if approved it would be up to the opposition parties to decide if they wanted a vote at the end of the debate. The strikes at 0100 GMT were 15 miles (24 kilometers) west of Homs.More news: Thousands of protesters take to the streets in Armenian capital
The Syrian government and Russian Federation called this information untrue, while the USA and allies have blamed Bashar al-Assad for the attack.
"This action risks not just further escalating the civil war in Syria but also a risky escalation of worldwide tensions", said the leader of the left-wing Scottish National Party, the third-biggest force in the British parliament.
"And the world said "enough" to the use of such weapons".
The center-right Conservatives rely on the support of the Democratic Unionist Party, Northern Ireland's biggest party, for a majority in parliament.
Trump also said that Russian Federation must decide "whether to continue on this dark path or come back to civilisation".
General Joseph Dunford, chairman of the US Joint Chiefs of Staff, said the allied strikes destroyed three main chemical weapons facilities.
The chairman of the worldwide affairs committee of Russia's upper house of parliament, Konstantin Kosachev, said the strikes were a violation of worldwide law and probably created to prevent investigators from the global chemical weapons watchdog from doing their work.More news: In Karnataka, Congress workers protest, destroy party office over distribution of tickets