Paul read Oriental Studies (Japanese) and then Law at Downing College, Cambridge, and spent a year in Poitiers studying French Law. After graduating, Paul worked in the Property and Trust Law Team at the Law Commission, and was called to the Bar by Lincoln's Inn.
He became a Fellow and College Lecturer in Law at Gonville and Caius College, Cambridge, in 2008, and was also a Newton Trust Lecturer in the Faculty of Law. He joined the Oxford Law Faculty as a CUF Lecturer in April 2013, and is a Fellow of St Catherine's College.
Paul's teaching and research interests lie primarily in the law of obligations and property. He is the author of Accessory Liability(Hart Publishing, 2015), which was the joint second prize winner of the 2015 Society of Legal Scholars Peter Birks Book Prize for Outstanding Legal Scholarship. Paul is also a co-author of Equity and Trusts: Text, Cases and Materials(2nd ed, OUP, 2016 (with Graham Virgo)), the author of JC Smith's The Law of Contract (OUP, 2016) and is one of the editors of Snell's Equity. Paul's work has been cited by the Supreme Court, and the Court of Appeal, both in this jurisdiction and in Singapore.