Theatre review: What Shadows at the Royal Lyceum, Edinburgh

There are plays which are beautifully made and staged, yet which matter hardly at all; and then there are plays like this latest piece from the formidable Scottish writer Chris Hannan. First seen in Birmingham last November, What Shadows is a bold and perhaps timely study of the nationalistic and racist passions unleashed by Enoch Powell’s notorious “rivers of blood” speech, delivered in Birmingham in 1968; a play more freighted with political significance and serious intent than any other you are likely to see this year.