The Optional Protocol to the UN Convention Against Torture (OPCAT) establishes an independent international monitoring committee (SPT) which itself will visit states and places where persons are deprived of their liberty. It also requires states to set up independent national bodies to visit places of detention. This book, drawing upon events held and interviews with governments, civil society, members of UN treaty bodies, national visiting bodies and others, identifies key factors that have shaped the operation of these visiting bodies since OPCAT came into force in 2006. It looks in detail...