Mair Williams’ practice focuses on white collar defence. She has considerable trial experience, having started her career as a criminal barrister in chambers, as well as experience in investigations, representing companies and individuals before regulators and prosecuting bodies, and developing compliance policies and practices for international clients. In addition to her white-collar work, Ms Williams has experience in all manner of complex commercial litigation and has represented clients at every stage from initial pleadings through to trial and appeal.

Ms Williams has conducted a range of internal investigations including an investigation of a financial services firm following a leak of confidential information to the media, and an investigation on behalf of a private pension scheme following allegations made by a whistle-blower. Her diverse range of representative experience includes representing a director in an investigation by the Financial Reporting Council in to discrepancies with annual accounts of a FTSE 250 company, and representing a publicly listed investment firm in investigations by the Financial Conduct Authority and Serious Fraud Office.

Ms Williams has an active pro bono practice focused on representing individuals in the criminal justice system, as well as providing legal advice to charities and NGOs.