The number of Scottish voters planning to vote against independence has fallen 72% over the last month as the two sides enter the last few weeks of campaigning.
While the no campaign still commands a 6% lead, that has fallen from 22% in early August, according to the YouGov survey, which excluding undecided voters found 53% leaning no versus 47% for yes.
That compares to a 61% to 39% split in favour of pro-unionism at the beginning of last month. The survey, for the Sun and the Times newspapers, echoes a Survation poll last week in the aftermath of the second televised debate, which SNP leader Alex Salmond was widely considered to have won.
‘This breakthrough poll shows that yes has the big momentum ,’ said Blair Jenkins, chief executive of campaign group Yes Scotland.
‘It's an all-time high for Yes support in a YouGov survey so far, and an eight-point swing from no to yes in just three weeks. We only need another three-point swing to achieve a yes for Scotland on the 18th.
‘Scotland is one of the wealthiest countries in the world. More and more people are beginning to realise that a yes vote is Scotland's one opportunity to make that enormous wealth work better for everybody who lives and works here, create more jobs here, and protect vital services such as the NHS from the damaging effects of Westminster privatisation.’