No one should complain that My Country; a work in progress is a grim night out. It’s rare for a good play to be written by royal command. The co-authors are the Queen’s personal minstrel, Carol Ann Duffy, and the director of her Royal National Theatre, Rufus Norris. These inspiring artistes have sent their vassals beyond the security of London to annotate ‘the words of people across the UK’ in the hope of understanding a humanitarian disaster: Brexit.