From the film-maker:

I chose the 'Madonna of the Rocks' as I love the painting. I can't help but find the characters within the painting slightly demonic in appearance, especially the adult faces of the children. I came up with a vision of Lucifer at the gates of hell. The real inspiration comes from all the political, religious paintings throughout the Gallery. The basic idea is that Satan is preening himself on a pile of skulls and then there is a clang from a till (representing accountancy) which rings up the seven sins. A skull falls into his hand with only its eyes (the window to the soul) and brain (to allow it to contemplate its actions in darkness for the rest of eternity). The skull mutters 'But God is supposed to judge me!' Satan replies 'He already has', laughs and flings the skull into a bottomless pit of eternal darkness.

Philip Gordon

A piece inspired by Leonardo da Vinci, The Virgin of the Rocks, about 1491 - 1508