Analysing the methods of countering Holocaust denial in a comparative manner proves a most helpful platform to assess historical methodology and practice. This research seeks to evaluate the differing agendas and perspectives between historical and legal approaches to refuting Holocaust denial from the David Irving v. Penguin Books Ltd. and Deborah Lipstadt libel trial. I owe a huge debt to Lance Cooper, partner of The Cooper Firm in Atlanta, Georgia, for providing the opportunity to work as a legal research intern at the firm before I began my research in September 2017. This provided a foundational understanding of legal strategies, the process of discovery, collecting and organising source material, as well as enabling me to refine my research and analytical skills in a legal setting. Working at a US-based firm was essential to gain a greater awareness of the American culture in which Professor Deborah Lipstadt operates, and to understand her criticisms of English libel law compared to US law. While in Atlanta, I was able to conduct research at Emory University in preparation for the Masters degree. I am especially thankful to Professor Deborah Lipstadt for kindly agreeing to meet with me to discuss my research in September 2017. Her input and advice at such an early stage in the research was critical, as it prompted new questions to consider in this thesis. Most especially, I am indebted to Professor Lipstadt for being so willing to put me in contact with a number of individuals from the defence team of the Irving v. Penguin case, for interviews, which proved fruitful. As a result, gratitude and thanks are owed to both Richard Rampton QC and Heather Rogers QC, for taking valuable time out of their schedules to meet with me for an extended interview in May 2018, to discuss the legal aspects of the Irving v. Penguin case and its implications. I am grateful to them both for their patience in answering my many questions and for their sage legal insights which proved invaluable to this research. Special thanks to Heather Rogers for continuing to keep me informed with current British legal cases involving Holocaust deniers, which has helped me to draw connections with contemporary legal activity in Chapter 6. To Joseph Fowler, partner at Hartley, Rowe & Fowler (Atlanta, Georgia), I owe my thanks for his advice and his helpful legal mindset which enabled me to frame my questions in preparation for my interview with Richard Rampton and Heather Rogers. Thanks to Professor Nik Wachsmann for my contact with him and for his enthusiasm for my research. Professor Wachsmann served as a researcher to Professor Richard J. Evans in the Irving v. Penguin case, so I am thankful to have been able to attend his workshop on "Sources, Archives, Evidence and the Teaching of the Holocaust" at the Wiener Library in December 2017, which provided useful additional training in research practices for this Masters degree.