He also took part in the Five programme Gender Swap, where he was dressed as a woman and was given a prosthetic makeover before being sent speed dating in his new persona, and presented the short-lived ITV gameshow 24 Hour Quiz. Shaun also made a guest appearance in ITV 1 show The Bill.
He played gang leader Dave Monks, who comes under scrutiny during an international drugs smuggling investigation. In 20 he recorded episodes of children's programme Scoop on CBBC (Children's BBC) with Hacker T Dog.
This was Williamson's second role in the hit soap; he previously had a brief role as a paramedic earlier in 1994.
Shaun de Waal has worked at the Mail & Guardian since 1989.
He was literary editor from 1991 to 2006 and chief film critic for 15 years. Recent publications include Exposure: Queer Fiction, 25 Years of the Mail & Guardian and Not the Movie of the Week.
Other television roles have included parts in the detective series Inspector Morse and the BBC sitcom Waiting for God.
In 20 he played a comically unemployable version of himself in Ricky Gervais' and Stephen Merchant's BBC sitcom, Extras.
In 2013, he made an appearance in a sketch for Russell Howard's Good News.