The painting
Media playback is unsupported on your device
Video

Fake Chagall: Owner takes 'action' to stop burning

A businessman who paid £100,000 for a work by the Russian artist Marc Chagall has been told it is a fake.

Martin Lang is having to resort to court action to stop it from being destroyed.

Will Gompertz reports.

Go to next video: Masters among 'Nazi art haul'