Francis Bacon was the loudest, rudest, drunkest, most sought-after British artist of the 20th century. His canvases regularly exceed £40million at auction. Bacon's appeal is rooted in his notoriety - a candid image he presented of himself as Roaring Boy, Lord of Misrule and Conveyor of Artistic Violence. He carefully cultivated the facade, protecting the complex and haunted man behind the myth.