LONDON (Sputnik) — The demonstration was organized by Stop the War Coalition, a pacifist movement that protested the 2003 Iraq bombings.
According to the pressure group, similar protests took place in over 30 cities and towns across the United Kingdom, including Manchester, Sheffield, and Leeds.
In London, people carrying placards that read "Don’t Bomb Syria" were seen demonstrating in front of 10 Downing Street, calling on members of parliament to vote against Prime Minister David Cameron’s plan to launch airstrikes on the Syrian soil.
Wrapping up the event, protest organizer and politician activist Lindsey German said she was pleased with the turnout and promised another rally, should the parliament decide to vote on Syria action, according to the Guardian.
"We’ve got thousands of people here… and there are dozens of demonstrations going on around the country," German said. "We will be lobbying MPs and doing everything we can to try and stop this bombing."
On Thursday, Cameron set out the case for extending UK’s military campaign against the Islamic State extremist group in Iraq to Syria. But he needs to shore up support of lawmakers from the opposition Labour party before he can press for a vote in the House of Commons.