Gemma is an experienced criminal barrister in this jurisdiction and beyond. Gemma was appointed Assistant Trial Attorney in the Office of the Prosecutor at the UN ICTR in the case of Prosecutor v Ildephonse Nizeyemana (ICTR- 2000-55). Assisted with preparing cross-examination of defence witnesses and appeared before the Tribunal. Drafted written submissions and acquired a detailed knowledge of the Rules and Procedure and law of the Criminal Tribunals.

Gemma is an experienced extradition barrister and has been involved in some of the most important cases in recent years. She frequently appears in the High Court on matters of complexity.
Gemma has appeared in numerous cases where a prima facie case must be shown and is being actively contested. Gemma often advises on the sufficiency of a request prior to any arrest.

Gemma has deployed various methods in representing those resisting extradition such as utilising FOI requests from UK authorities and Interpol, investigations in the requested countries and identifying novel legal argument. In one case, Gemma successfully argued a common law basis for the court hearing pivotal defence witness evidence via Skype where they would not have otherwise been able to testify. This led to a change in statute.

Gemma is skilled at liaising with foreign authorities and working with them to further their case.

Gemma has represented the Crown in a number of complex Bennett style abuse cases where it has been alleged that the UK authorities have colluded in the illegal extradition of defendants to face trial.

Gemma is instructed in public and private law children cases in the County Court and High Court and is particularly skilled at dealing with the heightened emotions such cases may cause. Gemma acts for parents, other family members, NYAS, CAFCASS and Local Authorities. Gemma represents children in complex residence and contact proceedings where children have been made party to the proceedings. Gemma undertakes child abduction work.

Gemma advises and appears in finance cases whether consequent on divorce or in TOLATA proceedings and has a particular skill for cases that have a legally interesting or factually unusual element. Gemma acts for intervenors in financial proceedings. Gemma is experienced in drafting and advising on nuptial, cohabitation and "pet nup" agreements.

Gemma is committed to alternative dispute resolution and can advise and represent in arbitration, private FDR, round table meetings, settlement agreements.

Gemma’s practice often involves appearing at the appellate courts, and Gemma is therefore skilled at Judicial Review and Public law cases and instructions.