This article was first published in the Mail on Sunday. The full report and data tables are below.
On the face of it, the government is in real trouble. The Supreme Court ruling against the Prime Minister follows a succession of parliamentary defeats, defections, expulsions and daily headlines about turmoil and chaos. But it is a good rule of thumb in politics that the noisier it gets, the more it pays to take a step back, a deep breath, and a good look at the bigger picture.