Oxford's Principles of Contractual Interpretation by Richard Calnan & Paul S. Davies - 3rd Edition 2026
| Author : | Richard Calnan, Paul S. Davies |
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| Oxford University Press's Principles of Contractual Interpretation by Richard Calnan and Paul S. Davies, Third Edition, is a 288-page practitioner's guide to how commercial contracts are read. Rather than surveying the case law, it reduces the subject to ten principles, each given its own chapter and illustrated by decided cases: objective intention as the guiding principle; the text, the whole text and the context; natural meaning, ambiguity and unnatural meaning; implied terms; and rectification and estoppel by convention. It closes with an epilogue, a section on principles of drafting and a model interpretation clause. The third edition adds eight years of case law and new discussion of implied terms, the limits of rectification, purposive interpretation, good faith and entire agreement clauses. For commercial litigators and arbitration counsel, transactional and in-house lawyers, judges and arbitrators, and LL.M. students of contract law. |
288
English
3rd Edition 2026
Tags: Commercial Law, Contract Law, Legal Commentary, Contract Drafting
Oxford's Principles of Contractual Interpretation by Richard Calnan and Paul S. Davies – Third Edition 2026
Oxford University Press publishes the Third Edition of Principles of Contractual Interpretation by Richard Calnan and Paul S. Davies — a 288-page guide to how commercial contracts are read, written for the practitioner who has to advise on, draft or litigate them.
Interpretation is the single most common dispute in commercial litigation, and the one on which the largest sums turn. What distinguishes this book is its method: rather than surveying the case law, it reduces the subject to ten principles, gives each a chapter of its own, and then shows through decided cases how that principle works in practice. The result is short enough to read through and precise enough to cite.
The ten principles
I. The Guiding Principle
- Objective Intention — the touchstone of the whole subject.
II. Text and Context
- The Text
- The Whole Text
- The Context
III. Understanding Words
- Natural Meaning
- Ambiguity
- Unnatural Meaning
IV. Adding Words
- Implied Terms
V. Changing Words
- Rectification
- Estoppel by Convention
The book closes with an Epilogue, a section on Principles of Drafting, and a model Interpretation Clause — the practical pay-off of the analysis, for anyone drafting rather than arguing.
New in the Third Edition
- Eight years of case law since the previous edition, worked into the principles.
- New discussion of implied terms.
- The limits of rectification.
- Purposive interpretation.
- The role of good faith.
- Entire agreement clauses.
Who should buy this book
- Commercial litigators and arbitration counsel arguing construction of contracts — the English authorities on interpretation are routinely cited in Indian courts and in international arbitration.
- Transactional lawyers and in-house counsel drafting commercial agreements, for whom the drafting principles and the model interpretation clause are directly usable.
- Judges and arbitrators.
- Senior Advocates and chambers handling contract, banking and finance disputes.
- LL.M. students and academics working on contract law.
About the authors
Richard Calnan is a banking and finance lawyer and a Visiting Professor at University College London, long known for his writing on contracts and security. Paul S. Davies is a Professor of Commercial Law at University College London and a writer on contract and equity.
