I see the predicted turnout for the May 5th election and referendum is predicted to be very low. In England, the referendum coincides with local Borough Elections which always has a low turnout. My own research shows that most people have no idea how local government works, and they are surprised when they discover that they can fall under three different councils depending on location.
In Scotland, the referendum coincides with the Scottish Parliament and regional assembly election, which will have a larger turnout. The conclusion here is that by default, Scotland will be getting a bigger say in the referendum.
This leads on the the bigger issue on devolution. The fact that Scottish MPs can vote on issues that only affect England.
Finally, why is there only one choice on the AV referendum?