His work includes BBC Television's This Morning with Richard Not Judy, Birds of a Feather, Channel 4's Desmond's, Chef!, starring Lenny Henry for the BBC, Kelsey Grammer Presents The Sketch Show for Fox Television, both The Harry Hill Show and an episode of Garth Marenghi's Darkplace for Channel 4, Alistair McGowan's The Big Impression, winner of the BAFTA award for Best Comedy Programme in 2003, and ITV's The Sketch Show, winner of the BAFTA award for Best Comedy Programme in 2002.
In 2003 Hanson produced his first feature film, Amma Asante's BAFTA award-winning A Way of Life.
He has produced the Ricky Gervais and Stephen Merchant movie Cemetery Junction for Sony International, released on 14 April 2010.
Hanson also worked on the Matt Lucas BBC2 television series Pompidou, which aired in early 2015.
His accusers allege that he used "his reputation" to prey on them as young women by "promising them a starry career under his wing".