Justin Fenwick QC > Chambers of Mark Cannon QC > London, England > Lawyer Profile

Chambers of Mark Cannon QC
4 New Square

Living Wage


Justin Fenwick came to the Bar in 1981 and was appointed QC in 1993 (the most junior member of the Bar to be appointed as Silk in the 1993 list). He has sat as a Judge in both civil and criminal cases, having been made an Assistant Recorder in 1994, a Recorder in 1999 and a Deputy High Court Judge (Chancery and Queen’s Bench Division) in March 2003. He was appointed a Deputy Judge of the Administrative Court in 2008. He was Head of Chambers at 4 New Square between 2000 and 2005 and has been a Bencher of the Inner Temple since 1997 and was Chairman of its Investment Sub-Committee between 2004 and 2011. He was Chairman of the Bar Mutual Indemnity Fund (the Bar’s own Mutual Insurer) from 1999 until 2013. He was a  Commissioner and in due course Deputy Chairman of the Royal Hospital Chelsea (home to the Chelsea Pensioners) between 2011-2017 where he sat on the Remuneration Committee and the Nominations Committee. He has an extensive offshore and international practice involving court appearances in Singapore, Hong Kong, Dubai, BVI, Cayman, Bermuda, St Vincent and Nevis.


Called 1980, Inner Temple Bencher 1998; QC 1993, recorder since 1996, Deputy High Court Judge Chancery Division, Queen’s Bench Division and Administrative Court since 2003; chairman of Bar Mutual Indemnity Fund since 1999; Head of Chambers 2000-06; previously ten years in Grenadier Guards (including intelligence and operational duties); assistant private secretary and temporary equerry to the Duke of Edinburgh 1979-81.


French, Spanish (fluent); some Italian, German.


Ampleforth College; Clare College, Cambridge (1971 Modern Languages and Architectural History).

Lawyer Rankings

London Bar > Commercial litigation

(Leading Silks) Ranked: Tier 3

Justin Fenwick QC4 New SquareA powerhouse litigator.

A ‘great set‘ with ‘several heavyweights and rising stars‘, 4 New Square is an increasingly popular destination for the City’s top litigation firms and practices, thanks to its impressive range of experienced silks and hungry juniors. Recently, Justin Fenwick QC and Graham Chapman QC represented Oleg Deripaska and Lolita Danilina respectively in their dispute with Vladimir Chernukhin and others in a major trial before the Commercial Court. Lucy Colter was Fenwick’s junior on the case.

London Bar > Offshore

(Leading Silks) Ranked: Tier 2

Justin Fenwick QC4 New SquareA very experience silk with a bulldog style; impressive for clients.

An ‘approachable and friendly set‘ that is ‘more accessible than quite a few of the Chancery sets, 4 New Square handles a mixture of work in the offshore space, with a stronger focus than others on professional regulatory proceedings and negligence claims against auditors and other professionals, on top of the typical company and insolvency matters. Justin Fenwick QC continues to represent the liquidators of Stanford Bank in Antiguan proceedings against two international law firms following the collapse of the notorious Ponzi scheme. Graham Chapman QC represented a defendant fund manager in a case in the Isle of Man, and represents a law firm in professional negligence case in the Cayman Islands.

London Bar > Professional negligence

(Leading Silks) Ranked: Tier 1

Justin Fenwick QC4 New SquareA supreme strategist.

4 New Square is ‘top of the tree for professional negligence work‘ thanks to its ‘wide range of experience and expertise meaning it is able to provide suitably experienced counsel for a range of claims and subject matters.’ Key highlights for the ‘user-friendly‘ set includes Justin Fenwick QC acting for the appellant in Manchester Building Society v Grant Thornton, which examined the application of SAAMCO in auditors’ negligence cases, while Ben Patten QC and David Halpern QC represented parties on both sides in Dreamvar (UK) Ltd v Mishcon de Reya, the leading case on liability for identity fraud in conveyancing. Elsewhere, Jonathan Hough QC, Miles Harris and Jamie Smith QC appeared in Accident Exchange v McLean, which examined the scope of legal professional privilege. Fenwick QC and George Spalton acted for PwC in Premier MotorAuctions v PwC & Lloyds, a £50m claim involving allegations of negligence and conspiracy, while Neil Hext QC and Alison Padfield QC acted on either side of a claim against insurance brokers arising from a fire at a popular East London bar.

London Bar > Construction

(Leading Silks) Ranked: Tier 5

Justin Fenwick QC4 New SquareA strong cross-examiner.

London Bar > Fraud: civil

(Leading Silks) Ranked: Tier 2

Justin Fenwick QC4 New SquareA razor-sharp intellect and as a strategist he is second to none.

London Bar > Insurance and reinsurance

(Leading Silks) Ranked: Tier 3

Justin Fenwick QC4 New SquareFerociously intelligent and very useful when there is a tricky and complicated plot to unravel.

London Bar > Product liability

(Leading Silks) Ranked: Tier 3

Justin Fenwick QC4 New SquareA very experienced product liability silk.