Rowena is a public law practitioner whose main areas of practice are in judicial review, statutory appeals, human rights and EU law. She specialises in immigration and asylum law as well as other areas of administrative law, including community care and actions against the police. She has particular expertise in EU cases and is the co-author of EU Law in Judicial Review (OUP, 2014). Rowena is accredited for direct access, which means she can be instructed directly by anybody without the need to go through a solicitor.

Rowena is recommended by Chambers and Partners, where she is described as a public law specialist "regarded for her ability to undertake the full suite of immigration matters on behalf of both private individuals and large businesses" and with comments including "very bright, thorough and offers excellent knowledge of EU law" and "a calm and assured all-rounder with the ability to handle PBS matters and complex human rights appeals with aplomb."

In addition to practice at the bar, Rowena regularly writes articles and gives talks. Between 2012-15, she completed a DPhil in law (Oxford University). She also convenes the Courts and Tribunals Working Group of the Immigration Law Practitioners’ Association, is Case Notes Editor of the Journal of Immigration, Asylum and Nationality Law, and writes practice notes for Lexis Nexis. During 2010-11, Rowena was judicial assistant to Lord Dyson at the United Kingdom Supreme Court.