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Chambers of Marcus Taverner QC

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John Marrin QC

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Keating Chambers (Chambers of Marcus Taverner QC)


John Marrin QC  specialises in construction, engineering and energy-related disputes.  His experience also extends to various other technical fields such as computer software, rail and supply disputes in the oil and gas sector.

John Marrin has practised from Keating Chambers for over 35 years.  He served as Head of Chambers from 2005 to 2010. Until 2017, he represented a wide variety of clients in the High Court, the Court of Appeal, the House of Lords and the Supreme Court in England and before various other domestic and international tribunals.

He is a former Recorder of the Crown Court and a former Deputy High Court Judge, sitting both in the Queen’s Bench Division and in the Technology and Construction Court.  He is a Chartered Arbitrator and a Fellow of the Chartered Institute of Arbitrators and he is named on various arbitration panels internationally.  John Marrin has long experience of acting as an adjudicator and as a mediator. He is a TECBAR Accredited Adjudicator and a CEDR Accredited Mediator.

John Marrin now practises primarily as an Arbitrator.


Called to the Bar - Inner Temple 1974, Queen's Counsel 1990, Assistant Recorder of the Crown Court 1993, CEDR Accredited Mediator 1993, Recorder of the Crown Court 1997-2014, Deputy Judge of the Technology and Construction Court 1997-2014, Fellow - Chartered Institute of Arbitrators 1998, Bencher of the Inner Temple 2002, Deputy High Court Judge 2008-2014


MA in Law - Magdalene College, Cambridge 1973

London Bar


Within: Construction – Leading silks

John Marrin QC - Keating ChambersA doyen of the international construction Bar and an international construction arbitrator of great skill and experience.

Within: Construction

Both senior and junior members of Keating Chambers constitute a ‘formidable line-up’. In the Supreme Court case of MT Højgaard v E.ON Climate & Renewables UK Robin Rigg East Limited, John Marrin QC and Paul Buckingham acted for successful appellants in a case concerning the fitness for purpose of an offshore wind farm; E.ON was awarded €26.25m.

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International arbitration: arbitrators

Within: International arbitration: arbitrators – Leading individuals

John Marrin QC - Keating ChambersA good, pleasant and cerebral chair; very hardworking and diligent.

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Professional negligence

Within: Professional negligence – Leading silks

John Marrin QC - Keating ChambersExperienced in construction, engineering and energy cases.

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