In 1961, a painting by Francisco Goya was stolen from the National Gallery of London.

It was assumed that a skilled gang of art thieves had broken in to sell it to a private collector.

The truth was much stranger: the thief was a retired bus driver who wanted charity payments to cover TV licences in Britain for the old and the vulnerable.

That story is the inspiration for a new film, The Duke, produced by Nicky Bentham