As I've said above they won't act as lender of last resort and they won't set monetary policy with regard to the needs of Scotland. A currency peg can be broken

As I've said above they won't act as lender of last resort and they won't set monetary policy with regard to the needs of Scotland. A currency peg can be broken, though it is embarrassing and usually very expensive during the period you try and defend it - see "Black Wednesday". Sticking with Sterling wouldn't even allow the option of crashing out of the monetary peg if needs be. I think you'd see an exodus of financial institutions' head offices down to London. An independent Scotland simply couldn't afford to bail out a large institution in Sterling, or even if it let banks fail couldn't afford the economic hit because its debts would be denominated in Sterling. Iceland was able to devalue by 60%, Greece wasn't able to. The point of the currency debate is that it has consequences with whichever choice is taken. Separately applying to join the EU saying "yes I know I have to join the Euro, but I'm not actually going to do that" isn't the best strategy in the book. France may get to pull that kind of thing, but they're already in the tent.