Alex Salmond’s success is just a symptom of our age of rage

In his short and infrequent visits to Scotland this year, the Prime Minister should have found time to speak to those supporting the ‘yes’ campaign. He would have seen and heard precisely the same complaints and exasperation that are driving his other great foe, Ukip.

For years, politicians have laughed about voters who are ‘mad as hell, and not going to take it any more’.