I had expected them to wait until 2019 given that's the probable date for the next general election. I think they might be timing this to coincide with Article

I had expected them to wait until 2019 given that's the probable date for the next general election. I think they might be timing this to coincide with Article 70 notification this week. Apart from people's fears about what that will mean, there's a chance of adverse reactions from the markets and business which might focus Scots' minds on what could happen. They're definitely not bluffing. Clue's in the name.