Mark Ovenden on the designs for our road signs system, plus BR’s and the NHS’ corporate identity.

Ever wondered who designed Britain’s road and motorway signs? This is the fascinating story of Margaret Calvert and Jock Kinneir, ground-breaking graphic designers, whose work everyone will still recognise today. They also created the ‘look’ of the NHS and signage for British Rail. Their collaborative output transformed the entire face of modern Britain and was copied worldwide.