This is a Scottish independence special of our regular series of posts that reports on the state of support for the parties in Westminster as measured by opinion polls. By pooling together all the available polling evidence we can reduce the impact of the random variation each individual survey inevitably produces. Most of the short term advances and setbacks in the polls are nothing more than random noise; the underlying trends – in which we are interested and which best assess the state of public opinion – are relatively stable and little influenced by day-to-day events. Further details of the method we use to build our estimates of public opinion can be found here.
In recent weeks the debate over Scottish independence has reached fever-pitch, and debate over some of the polls has been just as fierce. Most notably a YouGov poll for the Sunday Times, published on September 7th, caused shock waves both North of the border and in Westminster when it showed Yesmarginally ahead, the first lead for the “yes” campaign in many months.