Protests in US cities after airstrikes on Syria

May faces backlash

British Prime Minister Theresa May faced a backlash from the domestic opposition after launching military strikes on Syria without consulting parliament.

As the Conservative leader explained her rationale for the air strikes, opposition parties claimed the attacks were legally dubious, risked escalating conflict and should have been approved by lawmakers.

The shadow of the 2003 invasion of Iraq still lingers in the corridors of Britain's parliament, when MPs backed then-prime minister Tony Blair in joining US military action.

"Bombs won't save lives or bring about peace," said Jeremy Corbyn, the veteran leftist leader of the main opposition Labour Party.

"This legally questionable action risks escalating further... an already devastating conflict.

"Theresa May should have sought parliamentary approval, not trailed after Donald Trump."

Corbyn has written to May seeking assurance that there would be no further bombing raids and urged the government to negotiate a pause in the Syrian civil war.