Charles Mitchell is Professor of Law at UCL. His recent publications include Underhill & Hayton's Law Relating to Trusts and Trustees (19th edn, 2015) (with David Hayton and Paul Matthews) and Goff and Jones: The Law of Unjust Enrichment (8th edn, 2010) (with Paul Mitchell and Stephen Watterson). Paul Mitchell is Professor of Law at UCL. His recent publications include A History of Tort Law 1900-1950 (2015) and Goff and Jones: The Law of Unjust Enrichment (8th edn, 2010) (with Charles Mitchell and Stephen Watterson). Together they have also co-edited Landmark Cases in the Law of Contract, Landmark Cases in the Law of Tort and Landmark Cases in Equity (all from Hart Publishing).