Charles Mitchell is a Professor of Law at University College London. He is the author of Underhill and Hayton: Law Relating to Trusts and Trustees 18th edn (LexisNexis Butterworths, 2010) (with David Hayton and Paul Matthews) and Goff and Jones: The Law of Unjust Enrichment 8th edn (Sweet & Maxwell, 2011) (with Paul Mitchell and Stephen Watterson). He is also the editor of Constructive and Resulting Trusts (Hart, 2010).Paul Mitchell is a Professor of Laws at University College London. He is the author of The Making of the Modern Law of Defamation (Hart, 2005)and Goff and Jones: The Law of Unjust Enrichment 8th edn (Sweet & Maxwell, 2011) (with Charles Mitchell and Stephen Watterson). He is also a contributing editor of Chitty on Contracts 31st edn (Sweet & Maxwell, 2012). Together, Charles Mitchell and Paul Mitchell have also edited Landmark Cases in the Law of Restitution (Hart, 2006), Landmark Cases in the Law of Contract (Hart, 2008) and Landmark Cases in in the Law of Tort (Hart, 2010).