Duncan Preston (born 11 August 1946) is an English actor. He is known for his appearances in television productions written by Victoria Wood, including his roles of Clifford in the soap opera parody sketches Acorn Antiques, and Stan in the sitcom Dinnerladies (1998–2000). He reprised his role of Clifford in Acorn Antiques: The Musical! in 2005. His other television roles include DS Todd in the soap opera EastEnders (1987), Jonathan Haslam in the sitcom Surgical Spirit (1989–1995); playing Kevin's dad in Harry Enfield and Chums (1994); and Douglas Potts in the soap opera Emmerdale (2007–2011, 2014–2020).