Brian Taylor
Political editor, Scotland

Intriguing comments from polling organisation leaders on the potential outcome. They suggest that 'Yes' made significant ground, only for there to be a move back in a 'No' direction right at the very close.

All note the difficulty in assessing a referendum by contrast with elections - where there is a history of comparable voting behaviour. All agree the need to reassess polling methods.

As I say, intriguing - but of decidedly minor moment by comparison with the decision being taken by Scotland tonight.

Two years of campaigning. Two seconds to mark a cross on a small piece of paper.

Eleanor Bradford
BBC Scotland Health Correspondent

Campaigners gathered at the Better Together campaign at the Marriott Hotel in Glasgow say voters were reluctant to say openly if they voted "No" but instead gave "No" volunteers a surreptitious wink!

They replied with a "thumbs up" under their jackets.

Andrew Black
Political reporter, BBC Scotland

Lord Wallace, Advocate General for Scotland in the UK government, and Scottish Justice Secretary Kenny MacAskill are playing their cards close to the chest at the Ingliston central count.

Mr MacAskill says he's "contemplating a 'Yes' vote", while Lord Wallace says it would be "rash" to predict an outcome at this stage in the game. Both men, though, agree this referendum has been a victory for the people, whatever the result, given the remarkably high turnouts we've seen so far.

John Curtice
Professor of politics at Strathclyde University

Inverclyde has also recorded a very high turnout with 87% of voters having cast a ballot.

We have now had turnouts from three areas which are thought to be relatively fertile territory for the "Yes" side.

In all three cases the turnout has been 87% to 89%.

In contrast in the one place where "No" are expected to do well, and we have information on the number of papers that have been found in the ballot boxes, the turnout is somewhat lower at 84%.

Jane Lewis
BBC Scotland

Still verifying here in East Renfrewshire but "No" supporter Jim Murphy says "we've won it by miles."

The "Yes" camp tell me "it's a mixed bag".

Peter Kellner from pollsters YouGov told BBC Scotland: "We are saying 54% No, 46% Yes.

"We reckon there has been a two-point shift to No just today from either people shifting or from the 'No' people being especially determined to turn out to vote.

"The word out is that Glasgow is very close. Yes needs to win Glasgow comfortably if they are to win overall. If it is tight in Glasgow, 'No' has won Scotland."

BBC Scotland's political editor Brian Taylor is providing analysis through the night.

BBC Politics, external: First Minister Alex Salmond cancels appearance at own #indyref count, @bbcnickrobinson says

Historian Peter Hennessy tells the BBC in Westminster that the UK "will be a different country" whatever the result of the referendum. "The English question has been rumbling but will soon become a roar," he predicts.

Aileen Clarke
BBC Scotland

Police investigating allegations of electoral fraud in Glasgow. It relates to 10 votes cast in various polling stations around the city.

Editor of The Herald, Magnus Llewellin, external: BREAKING: Allegations of electoral fraud in Glasgow. Allegations of double vote impersonation in Glasgow #indyref

Former Big Brother winner, and Better Together campaigner, Cameron Stout looks on as the Orkney count takes place.

The Queen is to make a written statement on Friday afternoon, regardless of the referendum result.

Andrew McCallum sent these pictures from Jura of ballot boxes being collected: "The helicopter had arrived from Gigha to collect our votes and was then heading to Islay airport and Colonsay, before flying to Lochgilphead where the votes will be counted."

Image source, Andrew McCallum

Megan Paterson, BBC Scotland

Renfrewshire reports 117,612 votes cast, a turnout of 87.3%.

Sarah Smith, BBC Scotland news presenter

Better Together say they think "No" will win "comfortably" in Falkirk, the former Westminster seat of Yes Scotland chairman Dennis Canavan, who used to be a Labour MP.

Renfrewshire turnout figure 87.3%. That is 117,612 votes cast.

Prof Charlie Jeffrey told BBC Scotland the introduction of 16 and 17-year-olds to the electorate had been a great success.

He said: "I think the commitment of new voters has been very high but also the level of seriousness of the debate.

"Some special polling has been done on 16 to 17-year-olds by my colleagues at the University of Edinburgh and they found they were not more likely to vote 'Yes' but actually more likely than any other age group, except for pensioners to vote 'No'."

Shetland MSP Tavish Scott takes a selfie with first-time voters from the island's two high schools.

Plaid Cymru leader Leanne Wood says a "Yes" vote would be a "fantastic opportunity for Wales to get the settlement that we deserve here".

If there is a "No" vote, she argues, extra funding for Scotland under the Barnett formula might "cause a problem" for Wales, which gets a lower amount per head under the UK finding arrangement.