2) Also, here's some stats relating Scottish voting in the Independence Referendum to Scottish voting in the European Referendum:
Which shows that the relationship is...nothing at all. Kinda fascinating in its own right. Which would mean that there will be an awful lot of people in IndyRef 2 who voted to stay in the UK but also in Europe, and would explain why the polls showed a 2:1 ratio in favour of Independence a few days ago.
(With gratitude to Kate Cross her crunching the numbers. She points out that some more analysis (maybe weight by population in areas, or get smaller area-level data) and considering the slightly different make-up of the electorate for each referendum would be useful areas for further study.)
Original post on Dreamwidth - there are comments there.