She is best known for her roles on the children's TV shows No. 73 and ChuckleVision. She also played Marlene Marlowe in Marlene Marlowe Investigates and performed as part of the ensemble cast of former Saturday morning kid's show, On the Waterfront. Copstick executive produced Natural Born Racers TV series that follows the Virgin Media R6 cup which is currently filming its fifth series.
At the Edinburgh Fringe, she was a Perrier Comedy Award judge in 2003 and 2004 and a Malcolm Hardee Award judge in 2008-2013. She is also chief comedy reviewer for The Scotsman newspaper. She lends her voice to the announcements at Fort William train station.
Recently she has been spending much time in Kenya working with HIV+ women and their families. Through CWAC (Children With AIDS Charity), of which she is vice-chair, she has most recently started Mama Biashara (Business Mother) working to set these women up in small businesses thus making them financially independent. She made Positive Thinking for BBC1 - the UK's first television documentary on children and HIV/AIDS for children. She is a patron of the Waverley Care Trust.
- The Basil Brush Show (1 episode, 2003)
- ChuckleVision (10 episodes, 1992–2000)
- Marlene Marlowe Investigates (1993) TV series
- A Bit of Fry and Laurie (1 episode, 1992)
- On the Waterfront (12 episodes, 1988)
- No. 73 (20 episodes, 1986–1987)
- Show Me the Funny (2011) - Judge (TV)
- Dawn Goes Lesbian (2008) - Instructor
- The If.comedy Awards: A Comedy Cuts Special (2007) (TV)
- RIP 2002 (2002) (TV)
- Hotel Getaway (1 episode, 2000)
- No Kidding (1991) - Presenter
- Crosswits - Regular Panelist
- On the Waterfront (12 episodes, 1989)
- So You Want to be Top? (1983) (TV)- Co-host
- Masterclass: Girl on Girl: Erotic Print Society, Jan 2008. ISBN 1-904989-40-3 - ISBN 978-1-904989-40-0
- Porn Week: Erotic Print Society, May 2007. ISBN 1-904989-31-4 - ISBN 978-1-904989-31-8
- The Illustrated Book of Sapphic Sex: Erotic Print Society, May 2000. ISBN 1-898998-25-6 - ISBN 978-1-898998-25-9
- Women can't write about sex?
- "Broadcast magazine, 7 November 2007".
- Editorial Team
- "The Independent, 13 June 2009". London. 14 June 2009. Retrieved 7 May 2010.
- "The Scotsman, 14 May 2009". Edinburgh. 14 May 2009.
- "BBC News, 20th August 2003". 20 August 2003. Retrieved 5 January 2010.
- Jones, Rebecca (11 August 2004). "BBC News, 11 August 2004". Retrieved 5 January 2010.
- "Malcolm Hardee Award site, 2008".
- "UK game shows".
- CWAC's Board of Trustees
- "Key People". Waverley Care. Retrieved 2012-05-09.