Illness forced Kim Cattrall to withdraw from Linda, the Royal Court’s new show, and Noma Dumezweni scooped up the debris at the last minute. And what debris. All thoughts of kittenish Cattrall evaporated as Dumezweni strode on to the stage, a luscious blend of high-performance hair and trouser-suited luminosity. Linda is in her prime, at 55, a marketing director at a beauty firm, but she faces problems at home.