One of her most notable and long running roles, was playing the part of Gloria in the BBC sitcom "Brush Strokes" (1986–1991); remaining in the role for five series. However, it is her role in the BBC soap opera "EastEnders" (1998–1999) that she is most remembered for. Harrison played Louise Raymond, the selfish mother of Tiffany (Martine McCutcheon) and Simon (Andrew Lynford). Harrison's character was involved in several storylines, including an affair with her daughter's husband Grant (Ross Kemp). This role was not the first time Harrison had appeared in the soap. She had previously had a minor role in 1986, playing the mother of a young boy who was rescued from a speeding lorry by Andy O'Brien (Ross Davidson).