Susan Joan Holderness (born 28 May 1949) is an English actress on both stage and screen having had appearances in Bless This House (1974), The New Avengers (1977), Canned Laughter (1979), The Sandbaggers (1980), The Cleopatras and It Takes a Worried Man (1983), The Brief and Minder(1984), Doctors (2004-2014), Still Open All Hours (2018–2019) EastEnders and The Madame Blanc Mysteries (2021). However, she is best known for her role as Marlene Boyce in Only Fools and Horses from 1985 to 2003, and its spin-off The Green Green Grass from 2005 to 2009.