The work of a highly regarded British editor, Horrid Henry is a broad, noisy comedy based on a series of popular books and TV films about a rebellious primary-school boy in revolt against his family, school and all things genteel. The most interesting aspect is that Henry comes out in defence of his coeducational state school against the villains of the piece, who are the slimy headmaster of an expensive private school (Richard E Grant) and the snobbish parents who send their kids there to learn to sound their aitches and despise their contemporaries.