Meanwhile, the Pentagon has said that U.S. strikes in Syria overnight had successfully hit every target and were aimed to deliver an unambiguous signal to the Syrian government and deter the future use of chemical weapons.
International Development Secretary Penny Mordaunt opposed calls from MPs including Mr Corbyn - who has called for a War Powers Act - to give Parliament greater powers over military interventions.
"It was both right and legal to take military action together with our closest allies to alleviate further humanitarian suffering by degrading the Syrian regime's chemical weapons capability", May said.
The United States is preparing to impose sanctions on Russian Federation for "covering up" the actions of the Assad regime.
"The facility which was struck is located some distance from any known concentrations of civilian habitation, reducing yet further any such risk", the MoD said in a statement.
The Prime Minister is expected to face anger in the Commons after launching military action without securing the support of Parliament.
But shadow attorney general Baroness Chakrabarti questioned the Government's justification for the air strikes, telling BBC Radio 4's Today programme: "You can't use force under global law just to punish Syria for bad behaviour".
"We are prepared to sustain this response until the Syrian regime stops its use of prohibited chemical agents", the United States president said in a televised address.
"I have done so because I judge this action to be in Britain's national interest". This massacre was a significant escalation in a pattern of chemical weapons use by that very awful regime.
May is not obliged to win parliament's approval before ordering military action, but a non-binding constitutional convention to do so has been established since a 2003 vote on joining the USA -led invasion of Iraq.
British Prime Minister Theresa May described the strike as "limited and targeted".
"One year ago, Assad launched a savage chemical weapons attack against his own innocent people".
Over 100 missiles were fired on the morning of Saturday, April 14, targeting what representatives of coalition forces called chemical weapons sites in retaliation for an earlier poison gas attack.
"And we can not wait to alleviate further humanitarian suffering caused by chemical weapons attacks".