Big money, questionable financial dealings and undercover operations by business intelligence unit Black Cube — just another day in the industry, or the screenplay for a blockbuster?

Nobu Su biopic, The Outsider, which premieres in London this week before going on iTunes and DVD release, has all of the above and much more.

Perhaps it turned into something a bit more personal than Today Makes Tomorrow chief Su envisaged when he set out to make a film to explain how RBS “robbed” him of millions of dollars.