As we progress into the twenty-first century, Wales is acquiring a new identity and greater legislative autonomy. The National Assembly and the Welsh Government have power to create laws specifically for Wales. In parallel, the judicial system in Wales is acquiring greater autonomy in its ability to hold the Welsh public bodies to account. This book examines the principles involved in challenging the acts and omissions of Welsh authorities through the Administrative Court in Wales. It also examines the legal provisions behind the Administrative Court, the principles of administrative law, and the procedures involved in conducting a judicial review, as well as other Administrative Court cases. Despite extensive literature on public and administrative law, none are written solely from a Welsh perspective: this book examines the ability of the Welsh people to challenge the acts and omissions of Welsh authorities through the Administrative Court in Wales.