Mary Brett is a retired biology teacher. She taught in a co-educational comprehensive school in Glasgow for 5 years, then in an English Grammar school (selective) for boys for over 30 years where she was in charge of Health Education.
CanSS provides the admin for the APPG (All Party Parliamentary Group) on Cannabis: Harmful effects on developing brains in the House of Commons under the chairmanship of Craig Mackinlay MP. Meetings are held in the House two or three times a year. She is also a member of WFAD (World Forum Against Drugs) and an ex Vice President of Eurad.