My work concentrates broadly on four areas: terrorism/security and the law, constitutional law, human rights law, and gender and the law. Inevitably these themes sometimes overlap; much of my work on human rights law for example has taken place or develops further the work that I have done in the security/counter-terrorism context. Fundamentally my work is concerned with power and, more particularly, with the ways in which constitutionalist principles of limited, accountable and transparent power work, especially in situations of strain, emergency or crisis.
My work strives to consider law in context, and almost always adopts a comparative approach drawing insights from comparative constitutional law in particular, but also international law and international human rights law. In some of my work there is an empirical element; for example, the SECILE Project (on EU counter-terrorism) is heavily empirically informed having engaged in a structured manner with dozens of stakeholders.