A decisive vote to keep the UK's current system for electing MPs deals a further blow to Nick Clegg, after the Lib Dems suffered heavy election losses.
Out of 440 voting areas across the UK, Yes votes made up the majority in only 10 areas.
Nick Clegg says the public's overwhelming rejection of a change in the UK voting system is a "bitter blow" but vows to "move on".
Former Lib Dem leader Lord Ashdown has accused the Tories of a "breach of faith" over the AV referendum campaign.
Labour "should have" tried to change the UK voting system while it was in power, leader Ed Miliband tells the BBC.
Lib Dem Chris Huhne confronts Prime Minister David Cameron over the No to AV campaign's tactics at a cabinet meeting, sources say.
How AV would elect MPs in a General Election
Everything you need to know about referendum
Matthew Elliott from the No to AV campaign gives an opposing view
Katie Ghose from Yes to Fairer Votes makes the case for change
Tory chairman: Why you should reject "crazy" AV system
Lib Dem president urges you to seize chance to change system
The general secretary of the GMB gives a union perspective
The UK Independence Party's William Dartmouth on their stance
Former Lib Dem leader on why you should vote Yes to AV
Labour MP on why you should vote No on 5 May
Dubious claims on both sides - Dr Alan Renwick