The title “Mustn’t Grumble” refers to stereotypical British stoicism in the face of adversity. But there are different aspects to ‘Britishness’. The standard Union Jack in the top left-hand corner represents British pride and nationalism; bottom left is grey Britain left behind in a post-industrial world; and top right is multicultural, vibrant Britain. This painting is also an oversized QR code. Point your cell phone’s camera at it, and it will provide a link to an internet search highlighting alternative views on - and problems with - British national identity.