If I were Cameron I'd go camping out in Scotland, visiting as many places as possible in support of "no," maybe drag Clegg up with me and Thatcher too if she still has enough wits with her.
English Tories campaigning would be poison for the Scottish unionist side. And Thatcher was hated in Scotland and still is by many.
(That's the point...)
OK, but not that clear since you are a conservative yourself. Using a smiley or three ... afterwards would be helpful when you are being sarcastic about your own side. Otherwise it just looks like ignorance.
He's not joking...He's saying that the Tories would love for Scotland to secede because it would give them a near-permanent majority in Parliament.