Regarding the possibility of a 'leave' vote as a trigger for another Scottish referendum; this will have no impact on how people vote outside Scotland. The constitutional status of Scotland with the rest of the UK matters infinitely more to people in Scotland than in the rest of the UK, where it really isn't a big issue...
Unless Scotland's votes keep everyone else
in (which if it was that narrow wouldn't be the case anyway; see Northern Ireland, London etc; it changes how you cut the cake) then it would have an impact after the event. It's a good way to squeeze concessions from Westminster until 2020.