When Ted Hughes died in 1998, the way was clear for a biopic of the poet laureate's famously stormy marriage to fellow poet Sylvia Plath - a union that ended after six years with his defection and her suicide. Their murky history throws up a lot of universal questions about depression, the sex war and the tendency of gifted women to get snagged by the pram in the hall while their men go on to glory, riches and - usually - other women. But in Sylvia, Christine Jeffs focuses on the traditional, starcrossed lovers aspect of their story, and the result is soft soap indeed.