The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

1, Atkin Building, Gray's Inn, LONDON, WC1R 5AT, ENGLAND
Work 020 7404 0102
Fax 020 7405 7456

Mark Chennells

Work 020 7404 0102
Atkin Chambers (Atkin Chambers)


Mark has broad experience of acting both as sole counsel retained in proceedings and as junior counsel in very large commercially, legally and technically complex disputes with expertise in domestic and international arbitration, TCC and Commercial Court litigation, adjudication and mediation.

He specialises mainly in construction and engineering, professional negligence, IT and telecommunications and energy disputes representing governments, a wide range of contractors, private employers and their professional advisors all over the world. He also has experience of issues of private international law, including the jurisdiction of the English and foreign courts and the determination of applicable law.


Qualified 2002; Gray’s Inn.


Mark is a member of COMBAR, TECBAR and the SCL.

London Bar


Within: Construction – Leading juniors

Mark Chennells - Atkin ChambersExtremely hardworking, very bright, and excellent to work with.

Within: Construction

The ‘renowned’ Atkin Chambers has Manus McMullan QC acting on multiple cases in the multi-billion-dollar Panama Canal litigation, while Andrew White QC and Mark Chennells were involved in Fluor Ltd v Shanghai Zhenhua Heavy Industry Co Ltd, one of the largest quantum disputes in the Technology and Construction Court.

[back to top]


Within: Energy – Leading juniors

Mark Chennells - Atkin ChambersThorough, good on detail and very client-focused.

Within: Energy

Fielding some of ‘the top energy construction barristers in London’, Atkin Chambers provides ‘strong service’, and its practitioners are ‘outstandingly available’. It has been increasingly active in matters pertaining to renewable and nuclear energy, as well as in more traditional oil, gas and power work. Mark Chennells represented ZPMC in a high-profile $400m quantum case against Fluor arising out of the Greater Gabbard offshore wind farm project in the North Sea. Stephen Dennison QC acted for Engie in a £25m dispute with one of its contractors constructing upstream facilities in a North Sea gas field.

[back to top]

IT and telecoms (excluding regulatory)

Within: IT and telecoms (excluding regulatory) – Leading juniors

Mark Chennells - Atkin ChambersHe is extremely hardworking, very bright and excellent to work with.

[back to top]

International arbitration: counsel

Within: International arbitration: counsel – Leading juniors

Mark Chennells - Atkin ChambersThorough, good on detail, and very client focused.

[back to top]

Back to index

Legal Developments worldwide

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to