As a Cambridge City councillor between 2014 and 2018, Ann was lead councillor on domestic abuse and sexual violence and founded the Cambridge Community Forum on Domestic Abuse and Sexual Violence.

In 2018 she resigned from Cambridge City Council over their refusal to withdraw misleading guidance on exemptions under the Equality Act 2010. She set up the group Authentic Equity Alliance to promote and further the interests of women and girls and to campaign for the protection of single-sex spaces such as refuges. The group is in the process of seeking permission to Judicially Review the Equality and Human Rights Commission on the basis of its misleading guidance on the Equality Act exemptions.