'Mrs Bach was true genius'

Forensic analysis of some of Johann Sebastian Bach's best-loved works proves they were actually written by his wife, an academic claims.

Martin Jarvis, professor of music at Charles Darwin University in Australia, argues that Anna Magdalena, Bach's second wife, was actually the composer of some of his major works, including the Cello Suites.

A new documentary will now detail analysis of ink and writing style to "prove" Mrs Bach had far more input than previously thought.

Due to be screened at Bafta next week, the film Written by Mrs Bach includes evidence from a forensic scientist who analysed the composer's signature and scores.

While Anna is known to have transcribed for Bach in his later years, researchers found the handwriting did not have the "slowness or heaviness" usually attributed to someone who is merely copying, but was likely to have flowed from her own mind.