Political Editor of the New Statesman George Eaton, external quotes a Labour HQ source as saying: "Ed has to resign tomorrow. Everyone here accepts that."

He also quotes a Labour source on the Scottish results, who said: "Next government will have huge task uniting country".

In The Guardian, Political correspondent Rowena Mason writes: 'Ed Miliband has to resign' - recriminations begin in Labour camp, external.

The SNP's Kirsten Oswald takes her party from fourth to first to defeat the Scottish Labour leader Jim Murphy in East Renfrewshire.

Former shadow foreign secretary Douglas Alexander lost his Paisley and Renfrewshire South seat to the SNP's Mhairi Black.

Andrew Black
Political reporter, BBC Scotland

I think it's likely Scottish Labour will need a new leader, after Jim Murphy loses his seat.

SNP gain Renfrewshire East from Labour

SNP gain North Ayrshire and Arran from Labour

Some of the swings to the SNP have been massive so far,

• Inverclyde (Labour to SNP) - 31.6%

• Kirkcaldy and Cowdenbeath (Labour to SNP) - 34.5%

• Rutherglen and Hamilton West (Labour to SNP) - 31%

• Motherwell and Wishaw (Labour to SNP) - 33.8%

SNP gain Airdrie and Shotts from Labour

Andrew Black
Political reporter, BBC Scotland

It's worth saying a word about turnout, which has been very high in some places, like 71% in Aberdeen South, 70% in Kirkcaldy and Cowdenbeath and, in Berwickshire Roxburgh and Selkirk, 74%. That shows voters are energised. The figures could also relate to a referendum "bounce" - turnout in the vote on Scotland's future last September was 84.59%.

SNP gain Inverclyde from Labour

Fiona Hyslop says this "seismic shift" is "a symbol that old politics is out".

She says: "It's like nothing I've ever seen in my lifetime. I'm staggered by the amount of confidence the public have put in the SNP.

"It is a time of optimism for people of Scotland."

SNP gain Paisley and Renfrewshire North from Labour

Andrew Black
Political reporter, BBC Scotland

This is looking like a truly massive night for the SNP at the expense of Labour. The SNP is claiming victory in traditional Labour-voting seats, such as those in the west of Scotland, with swings of more than 30% in some cases.

Tim Reid
Political correspondent, BBC News

Massive Labour loss in Gordon's Brown old seat Kirkcaldy and Cowdenbeath goes to SNP on a 35% swing.

The SNP have won Kirkcaldy and Cowdenbeath, which had been represented by former prime minister Gordon Brown in the last parliament.

The SNP's Roger Mullin took 27,628 votes - a swing from Labour to the SNP of 34.5%. An amazing swing but just short of the 34.9% in nearby Glenrothes.

John Curtice
Professor of politics at Strathclyde University

East Dunbartonshire: Jo Swinson will be deeply disappointed that she has lost this seat, even though her vote is only down by 2 points, easily the best Lib Dem performance so far tonight. However, the 30-point increase in the SNP vote, much as anticipated by the exit poll, has still swept her away.

SNP gain Kirkcaldy and Cowdenbeath from Labour

SNP gain Rutherglen and Hamilton West from Labour

SNP gain Midlothian from Labour

SNP gain Dunbartonshire East from the Liberal Democrats