The peace movement was later associated with the Peace camp movement as Labour moved "more to the center" under Prime Minister Tony Blair. By early 2003, the peace and the anti-war movement, mostly grouped together under the banner of the Stop the War Coalition, was powerful enough to cause several of Blair's cabinet to resign, and hundreds of Labour Party MPs to vote against their government. Blair's motion to support militarily the U.S. plan to invade Iraq continued only due to support from the UK Conservative Party. Protests against the invasion of Iraq were particularly vocal in Britain. Polls suggested that without UN Security Council approval, the UK public was very much opposed to involvement, and over two million people protested in Hyde Park (the previous largest demonstration in the UK having had around 600,000).