© Matthew Buck Hack Cartoons

If anyone ever doubted the power of an image to open a story then the sight of a man grabbing a woman by the neck in public should have ended the uncertainty. The images of an in-marriage dispute between Charles Saatchi and Nigella Lawson have proved an invitation to examine the nature of power at a basic level.

It also provides a frame for a broader point about the position of the country made in the drawing above.