Since joining Peters & Peters in 2010, Charlotte has represented clients in some of the most high-profile and high-value cases in recent times, acting for individuals and corporates in a broad range of sectors including government, royalty, entertainment, finance, construction, engineering and retail.

Charlotte is recognised as a “Future Leader – Partner” in Who’s Who Legal in the Investigations chapter, and a ‘Next Generation Partner’ in Legal 500 2024 for her white-collar practice, and is noted for her work in private prosecutions, regulatory investigations, and corporate crime. One client commented that she “is able to monitor cases with an iron fist in a velvet glove. Her very pragmatic and subtle analysis allows her to be very efficient and successful”.

Chambers 2025 recognises Charlotte as ‘up and coming’ in Financial Crime: Private Prosecutions, with clients saying that “She's highly regarded by our team” and "I only have positive things to say about her; she's very direct and straight-shooting".

Legal 500 2023 recognised Charlotte as a 'Rising Star' noting her international practice, with standout involvements in areas such as sanctions, extradition, and cross-border business crime proceedings. Her previous listing as a 'Rising Star' in Legal 500 2022 quoted "Charlotte Tregunna should be the first name on any list of rising stars in the white-collar crime world. She is bright and ferociously hardworking, but with real practical instincts. She is also exceptional at dealing with difficult clients".

Charlotte specialises in advising clients facing domestic and international internal, criminal and/or regulatory investigations, including those brought by the Serious Fraud Office, the Financial Conduct Authority, the Competition and Markets Authority, the City of London Police, US Department of Justice and Securities and Exchange Commission.

Her private prosecution experience includes assisting the team that successfully prosecuted what was then the highest value private prosecution brought by an individual (R (Mirchandani) v Somaia).

Charlotte’s cases frequently have an international dimension, requiring close co-operation with jurisdictions including those in the EU, Switzerland, Russia, Ukraine, and the UAE. She has had success in discharging extradition requests from India, Greece, and Russia, including the case of Egorova & Others, the leading case on the UK’s approach to/treatment of women facing Russian extradition requests.

Charlotte is the Co-Chair of the Human Rights Committee of the International Association of Young Lawyers (AIJA) and former Co-President of its Business Crime and Civil Fraud Commission.