Fiona regularly appears in high profile public law cases, including at Supreme Court level. Recent Public / Administrative Law cases include:
 R (Bridges) v The Chief Constable of South Wales & others – Acting for the Police and Crime Commissioner of South Wales Police in the Court of Appeal in an appeal concerning the use of automatic facial recognition technology
 R (Short & others) v The Police Misconduct Tribunal and others – Acting for the IOPC in this case concerning whether the fact the tribunal have read allegedly inadmissible or prejudicial material gives rise to apparent bias and a requirement to recuse.
 Re Beale - Acted for the Chief Constable of West Midlands Police in the expedited judicial review (including injunctive proceedings) concerning apparent bias in misconduct proceedings involving ACC Beale.
 Acted for the Chief Constable of Greater Manchester Police in the judicial review concerning determinations made by the IPCC re disclosure issues arising out of the investigation into involvement of Arran Coghlan in the death of Stephen Akinyemi.
 Acted for the Chief Constable of Nottinghamshire Police in a proposed judicial review by Nottingham City Council of the decision to change the policing delivery model.
 Nunn (Supreme Court)  UKSC 37- Acting for Suffolk Constabulary in a test case concerning the disclosure obligations of the police post-conviction and appeal.
 A v B Constabulary – Acting for B Constabulary in the Administrative Court in the leading case concerning the vetting of police contractors and their entitlement to reasons for rejection and the impact of public interest immunity considerations.
 Icelandic Bank Collapse (Tchenguiz) – Acting for the City of London Police in a judicial review arising out of the arrest and bail of Robert Tchenguiz in connection with his dealings with the collapsed bank.