British Prime Minister Tony Blair tonight won the House of Commons' backing for his plans to replace Britain's Trident nuclear deterrent, despite the biggest Labour backbench revolt since the Iraq war.
With the Tories backing the government, a motion supporting Trident renewal was passed comfortably by by 409 votes to 161, a majority of 248.
An amendment tabled by rebel Labour MPs to delay a decision was defeated by a similar margin of 413 to 167, a 246 vote majority.
However the vote left the Labour Party bitterly divided with 95 MPs supporting the rebel amendment and 88 opposing the government on the main motion. The rebels immediately vowed to carry on their campaign against Trident renewal, leaving Chancellor Gordon Brown - if as expected he succeeds Mr Blair as Prime Minister - with the prospect of more battles ahead.
Left winger John McDonnell, who has said that he intends to run against Mr Brown, said the leadership was out of step with the party.
"The scale of this rebellion clearly demonstrates that the Prime Minister has completely misjudged the overwhelming mood in the party," he said. "This is only the beginning of the campaign against Trident's replacement."
Armed Forces Minister Adam Ingram however denied that the vote had been a setback for the government. "I don't see this as a bloody nose. I see this as a very considered opinion by the House of Commons," he told Sky News.
"This was a debate for the nation, not the Labour Party alone." As well as the familiar Government critics, the rebels included former home secretary Charles Clarke and Andrew Smith, another ex-Cabinet minister and close ally of Mr Brown.
Earlier two more ministerial aides - Stephen Pound, the parliamentary private secretary (PPS) to Labour Party chairman Hazel Blears, and Chris Ruane, the PPS to Northern Ireland Secretary Peter Hain - resigned in protest.