Campbell was active in the
Labour Party from the 1930s. At the
1958 London County Council election, she was elected in
Holborn and St Pancras South, serving until 1964, when it was replaced by the
Greater London Council. On the new body, Campbell represented
Camden and also served on
Hampstead Borough Council and its successor,
Camden London Borough Council, in the Priory ward. She was an alderman on the council from 1971 to 1978. Campbell devoted much of her time to the
Inner London Education Authority, becoming chair of the body in 1977, having served as vice-chair since 1967. She left the role in 1978, and then served on the board of the
Hampstead Theatre, and was its chair from 1985 until a few weeks before her death. During her time on the board, she oversaw the theatre's relocation from Hampstead to a new site in
Swiss Cottage. Campbell was a particular supporter of the
Central School of Speech and Drama. She served as a governor for several schools: Frank Barnes school for the deaf, the Franklin Roosevelt school for the disabled and the
Royal Free Hospital school. == Personal life and death ==