John specialises in commercial disputes. His specialisms include: public law and judicial review, law of contract, property law, planning law and general commercial litigation. He is a recognised leader in Jersey contract law, Jersey customary law and Jersey property law.

The many high profile cases he has acted on include Les Pas Holdings Limited v States of Jersey; J.P.M.O. and TOP Produce v States of Jersey; Anchor Trust v Jersey Financial Services Commission; Jersey Financial Services Commission v Cater Allen Trust Co Ltd; Attorney General v Bhojwani; Crociani v Crociani and others.

John was elected President of the Law Society of Jersey in 2017 and served in that office until 2021. He is also a Fellow of the Royal Historical Society.

John was called to the English Bar in 1991 and became an Advocate of the Royal Court of Jersey in 1994. He has been a partner since 1995.

He is a prolific writer on local law and a founding member of the Jersey Law Review.

He is a qualified mediator and is an Associate of the Chartered Institute of Arbitrators. 

• Law Over Borders Comparative Guide: Commercial Litigation and Cross-border Enforcement - Jersey