From the Guardian on 18th March based on the Opinium Poll for the Observer:
‘A survey by Opinium for the Observer shows that 54% agree that the UK’s vote to leave the EU has made a break-up more likely. Among Scots, the figure is even higher, at 63%.’
The actual report doesn’t seem to be available yet so I rely on the Guardian article. Either way it’s pretty encouraging and suggests the other opinion polls are getting ‘conservative’ or ‘status quo’ responses from individual voters about their own voting intentions. If you think others are going to vote for independence yet say ‘don’t know’ about your own intentions then I read that as a ‘shy’ response to a question considered a bit ‘unacceptable’ to some who you think might think negatively of you. Remember all the ‘shy’ Tory voters at the last general election? I know myself, as a confirmed Yes supporter, I remain uneasy about seeming too nationalistic. It’s an especially strong reservation among older voters who have long suffered insults if they think people will think them narrow or vulgar nationalists. However, if you’re asked what the rest of the population might do, these sensitivities are reduced. Opinium Research carried out an online survey of 2,007 UK adults aged 18+ from 14 to 17 March 2017. Online surveys tend to be more accurate than face-to-face interview methods where the above reluctance to be honest is more often present.
The Guardian notes:
‘The figures are likely to make uncomfortable reading for the Conservative government. Theresa May, the prime minister, is already planning a tour of Wales, Scotland and Northern Ireland in an attempt to build a consensus before triggering article 50.’