Living in South Ferriby, North Lincolnshire, Clark worked as a deputy headteacher. In 1982, she joined the Ecology Party, following concerns about nitrate levels in drinking water. At the European election, 1989, she stood in Humberside, taking 14% of the votes cast.
- Polly Ghazi, "The Greens bow out, victims of their own success", The Observer, 12 June 1994
- United Kingdom European Parliamentary Election results 1979-99: England: Part 1
|Party political offices|
|Principal Speaker of the Green Party of England and Wales