In 1973, she joined the cast of Upstairs, Downstairs as the new housemaid Daisy Peel (later Barnes). She played this role for 32 episodes until the programme's end in 1975. After Upstairs, Downstairs finished she went back to theatre and played at Coventry rep. She also had roles on television in Hard Times, Spearhead and, alongside Lesley-Anne Down who had appeared with her in Upstairs, Downstairs, in The One and Only Phyllis Dixey. From February to April 1982, Tong made several appearances in Coronation Street as Jackie Moffat, a neighbour of Gail Tilsley. During the 1980s and 1990s, she appeared in Growing Rich, Middlemarch and David Copperfield.