The head of polling company YouGov said he was "99% certain" a victory for the pro-union No camp.
In an interview with Sky News, Peter Kellner said: "Now, at the obvious risk of looking like a complete prat in about eight hours time, I would say it's a 99% certainty it's a No victory."
He said his judgement was based in a survey of 1,828 people after they had voted, in addition to postal votes showing a 54% majority for No.
This Thursday Scotland decides... will they vote Yes or No for Scottish independence?
On Friday morning we'll have a special edition of the show, tune in from 6am to 10am on Friday 19 September, to watch Good Morning Britain: Scotland decides.
On Monday's show we're marking the 20th anniversary of the hit TV show Friends and we want you to tell us what your favourite scene from the show is.
So watch our memorable video clips from the series and get voting!
The first of the Girls Aloud stars to have a baby, Nadine Coyle, is over from her home in the US to perform as part of Michael Flatley's Riverdance Tour and will be joining us live to tell us all about working with the legend and life in America.
Phones 4U administration help – plus the usual deals including free days out in London, Scotland and Wales, ‘free’ £4 - £5 Lego, and from £15 unlimited day travel on London Midland – these are our Money Saving Expert Martin Lewis’ deals of the week.
Have you ever had a mishap because you were so distracted by your mobile phone? Whether it was walking into a lamp post, tripping over your dog or spilling coffee down yourself before a big date, we want to know how your phone has gotten you into trouble!