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Essex Court Chambers

Living Wage
Work 020 7813 8000
Fax 020 7813 8080
London, Singapore

Siddharth Dhar

Work 020 7813 8000
Essex Court Chambers (Essex Court Chambers)


Siddharth acts as an advocate and advisor in substantial commercial litigation and arbitration disputes spanning the full breadth of Chambers’ work. In recent years, he has appeared in cases before the Court of Appeal, all divisions of the High Court, and in large value commercial and investment treaty arbitrations under a wide variety of institutional rules. He is regularly instructed as the sole advocate, or as part of a larger counsel team (whether that is with a Silk or leading a more junior barrister).  

Siddharth’s Court work in 2015 has included successfully acting for Iraq’s oil marketing organisation in the Court of Appeal, in a case which is now to be heard by the Supreme Court (Taurus v SOMO [2015] EWCA Civ 835); for a Nigerian oil interest defending a challenge to an arbitration award (C v D [2015] EWHC 2126); and for a large investor in the Ukrainian retail sector (Stockman v Arricano [2015] EWHC 2979). He is also presently acting for the Republic of Kazakhstan before the Commercial Court in resisting a jurisdictional challenge to an UNCITRAL award (Ruby Roz Agricol v Kazakhstan).  

Much of his recent work has involved arbitration and he has acted and advised on arbitrations under the ICC, ICSID, LCIA, SIAC, AAA and LMAA Rules and in ad-hoc arbitrations under the UNCITRAL Rules. He has been instructed on some of the largest commercial arbitration and investment treaty disputes, including the $38 billion ICC dispute between Botaş and NIGC.  Recent examples of his investment treaty work include acting for the investors in Agility v Pakistan (ICSID Case No. ARB/11/8) and BSG v Guinea (ICSID Case No. ARB/14/22); and for the state in Albaniabeg v Albania (ICSID Case No. ARB/14/26) and Hydro & Ors v Albania (ICSID Case No. Arb/15/28).


Called 2005, Middle Temple.


COMBAR; LCIA Young International Arbitrators Group.


Nottingham High School; Downing College, Cambridge University (2003 MA Hons, Double First); Harvard (2004 LLM); St Catherine’s College, Oxford (2006 BCL, Distinction).

London Bar


Within: Leading Juniors

Siddharth Dhar - Essex Court Chambers ‘ A star performer in international arbitration. ’

Within: Energy

Essex Court Chambers is 'a "go-to" set in London for complex matters' and has 'excellent strength in depth'.  In 2017 and 2018, the set was instructed in energy cases with a combined value in excess of $80bn related to oil, gas, coal and renewable energy. Graham Dunning QC was lead counsel for the Kurdistan Regional Government in a $35bn LCIA arbitration relating to an oil and gas project in Northern Iraq and potential pipelines to serve Europe. Paul Key QC successfully represented Nigeria in its defence of a $9bn arbitration award. David Mildon QC represented the applicant in Kufpec UK Limited v Enquest Heather Limited, which centred on issues under a Farm-In Agreement for various North Sea license blocks. Among the juniors, Siddharth Dhar acted as sole lead advocate for the defendant in Hydro & Ors v Republic of Albania, a $1.5bn ICSID claim arising from alleged investments in the hydroelectric sector. According to one client: 'The clerks are uniformly excellent – responsive and helpful'.

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International arbitration: counsel

Within: Leading Juniors

Siddharth Dhar - Essex Court Chambers ‘ Very rigorous and does a great job at analysing arguments and challenging them. ’

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