I'm not sure that the polling has been large or frequent enough to draw good conclusions about the support by segment yet. I suspect only the SNP will chose to spend the money doing that research and I think they'll keep that to themselves regardless of the results.
I also note the large numbers of don't knows. Reflecting on my experience of watching the polls for the AV referendum and watching the don't knows gradually and then very quickly harden for a No vote I'd say it was all to play for.
Wasn't the last referendum set up that it needed 60% in favour of independence, because it was such a huge revolution for the country, that they felt that a yes vote with 50%+1 was going to be very hard to convince the other half of the country to go along with it.
The rule was that 40% of the total electorate had to vote in favour. Which meant that they needed 80% turnout, and as turnout was 62%, it failed, despite 52% of the people who voted being in favour.
The devolution referendum in the 70's required 50% plus 1 to vote Yes and for 40% of the electorate to vote Yes also - so a requirement for a high turn out.
I think the official reason was that a big change constitutional required significant backing. I think the real reason had more to do with the Labour Party's concerns about losing UK General Elections.
The devolution referendum in the 90's was a straight 50%+1
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I also note the large numbers of don't knows. Reflecting on my experience of watching the polls for the AV referendum and watching the don't knows gradually and then very quickly harden for a No vote I'd say it was all to play for.
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Not sure what happens if the referendum is multiple option. Perhaps we use AV.
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I think the official reason was that a big change constitutional required significant backing. I think the real reason had more to do with the Labour Party's concerns about losing UK General Elections.
The devolution referendum in the 90's was a straight 50%+1
We've yet to have a referendum on independence.