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.
English Local Elections
Nick Clegg faces calls to step down as Lib Dem leader after the party suffered heavy losses in councils in the English council elections.
Labour must learn "deep lessons" from its defeat in Scotland and English local election results, leader Ed Miliband says.
The LSE's Professor Tony Travers examines the outcome of the English local government elections.
Green party leader Caroline Lucas says there is now a sense that the Greens are a real alternative, after gains in the English local elections.
The British National Party has lost many of the seats it held on local councils in England.
After 279 of 279 councils declared
Find results for your local council
Tavish Scott quits as leader of the Scottish Lib Dems with immediate effect, after the party's election night disaster.
How will the Scottish independence referendum work and what are the main issues facing such a move?
The UK government will not move to block a referendum on independence for Scotland, Scottish Secretary Michael Moore says.
The collapse of the strong Liberal Democrat vote in the Highlands leads to more seat gains for the Nationalists.
BBC Scotland's live coverage of the Scottish election 2011.
Scottish politics is completely changed after the SNP defeats Labour in many of its west of Scotland heartlands.
After 73 of 73 constituencies declared
Find your Scotland constituency
Talks continue within political parties about the prospects of forming a coalition government in the Welsh assembly.
Welsh Conservatives announce Preseli Pembrokeshire AM Paul Davies is their interim leader, replacing Nick Bourne.
Labour say they expect to be in government in Cardiff Bay by the end of next week, following their strong performance in the assembly election.
BBC Wales' live coverage of the Welsh election 2011.
Labour's assembly victory in the south Wales valley seat of Blaenau Gwent marks the end of an unhappy chapter for the party.
After 40 of 40 constituencies declared
Find your Wales constituency
All 582 seats are declared in Northern Ireland's council elections, with losses for Ulster Unionists and the SDLP and gains for the DUP, Sinn Fein and Alliance.
DUP leader Peter Robinson dedicates his party's showing in the NI Assembly election to the memory of murdered Catholic police officer Ronan Kerr.
Read our minute-by-minute coverage of Saturday's Northern Ireland Assembly election results and reaction.
At the age of 62, the DUP leader Peter Robinson has become the 'comeback kid' of Northern Ireland politics.
The Ulster Unionist leader Tom Elliott hits out at people waving tricolours at the Omagh election count, describing them as the "scum of Sinn Fein".
- Cameron: Coalition can survive02:52
- Salmond cites 'trust' of Scottish vote05:57
- Ashdown attacks AV campaign01:02
- Hague: 'It's a good morning for Tories'01:25
- 'Voters' clear message to coalition'01:40
- 'We need to dust ourselves down'01:39
- Plaid's Helen Mary loses Llanelli00:51
- Gray admits to bad night for Labour04:35
- Lib Dems: We must hold our nerve 01:09
- Welsh leader blames coalition for drop01:28
- Fabiani earns first SNP gain over Labour04:13
- What is the alternative vote?01:37
Features & Analysis
Out of 440 voting areas, Yes votes made up the majority in only 10
The DUP and Sinn Fein share the spoils of the Northern Ireland vote
The Lib Dems have to decide what they are for, says James Landale
Relive Thursday's elections minute-by-minute
Examining what made the UK reject electoral change so strongly
The SNP's stunning success has consequences for the entire UK
A look at the history of the Scottish National Party
Gloom amid Lib Dem activists in Clegg's Sheffield heartland
Watch campaign broadcasts on the AV referendum and national and local elections