Robert Carlyle comes of age to play UK prime minister in new TV series

We first saw him as a young thug in Trainspotting, but Robert Carlyle has come of age to play the UK prime minister in an exciting new TV series, writes Ed Power.

There are actors who light up the screen and there are actors who go off like a blowtorch when the cameras start rolling. Robert Carlyle has for most of his career belonged emphatically to the second category.