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Haynes and Boone, LLP

Helen Conybeare Williams

Helen Conybeare Williams


  • Energy Litigation
  • Energy Power and Natural Resources
  • Europe, Middle East and Africa
  • International

WSG Practice Industries


Helen Conybeare Williams is a disputes lawyer based in London. Helen’s practice is focused on international dispute resolution, as well as contract advice and representation prior to arbitration or litigation, in complex technical cross border disputes.

She has conducted complex international commercial arbitration matters worldwide on behalf of major multi-nationals across a broad range of industries, namely shipbuilding and offshore oil and gas (related to marine construction, drilling and exploration agreements), construction and engineering of major capital projects (including power plants, gas and water pipelines, highways, irrigation, hydroelectric and desalination plants, ports and airports), hotels (including development, management and franchise agreements) manufacturing and supply of industrial plant and machinery, and healthcare (distribution and license agreements).
She has conducted international commercial arbitration proceedings under the rules of major arbitration institutions, in particular the International Chamber of Commerce (ICC), the London Court of International Arbitration (LCIA) and London Maritime Arbitrators Association (LMAA), as well as under UNCITRAL rules. She has conducted such disputes throughout Europe, the Middle East, and the Asia-Pacific region.

She also represents clients in litigation in the courts of England and Wales, including in arbitration appeals and enforcement issues.

Helen has advised on the selection of jurisdiction clauses and dispute resolution mechanisms, and is experienced in drafting the relevant clauses.

Bar Admissions

England and Wales, 1992
Paris, France, 1997 (inactive)


M.A., Jurisprudence, St. Hugh's College, Oxford University, 1988
European, International and French Law, Strasbourg University, 1990
Law Society Finals, Guildford College of Law, 1989
Areas of Practice

Energy Litigation | Energy Power and Natural Resources | Europe, Middle East and Africa | International | International Arbitration | Litigation | Offshore Oil and Gas | Offshore Oil and Gas Dispute Resolution | Oil and Gas | Oil and Gas Litigation | Shipping | Shipping Dispute Resolution

Professional Career

Significant Accomplishments

Leading the team in the successful defense of a subcontractor’s delay and disruption claims against the main contractor related to onshore works to lay gas pipelines which was part of the Total Laggan Tormore gas pipeline/field development in the Shetlands conducted in the English Technology and Construction Court

Defending a Dutch yard in 17 ad hoc arbitrations related to shipbuilding contracts for the construction of pushers (warranty and design defects claims alleged by the buyers) with Rotterdam as place of arbitration

Successfully advancing/defending claims acting for the owner in an SCMA arbitration based in Singapore relating to a dispute arising out of the upgrade of a semi-submersible drilling rig relating to disputed variations across the range of engineering disciplines, delay and disruption claims, and claims for liquidated damages for delay

A London LMAA arbitration acting for a Far Eastern shipyard pursuing significant claims against the buyers of two semi-submersible drilling rigs for the contract price and counterclaims raising misrepresentation and breaches of contract claims during the construction of the projects, where successful awards were obtained.

A Kiss and Handshake Promise to Pay Part of a Pre-Existing Debt Needs Careful Consideration
Haynes and Boone, LLP, October 2018

English High Court considers whether there was good consideration for an oral variation of a settlement agreement related to sale of valuable antique textiles. Sometime in the spring of 2014 two Iranian businessmen and antiquities dealers, London based Mr. Shavleyan and LA resident Mr. Simantob, kissed and shook hands on a deal about the payment of the balance of a debt due under a 2010 settlement agreement...

Jar Wars: The Return to Mr. Jeddi In another case about disputed provenance and ownership London’s Commercial Courts are asked to decide on competing claims for a Medieval Islamic rock crystal jar.
Haynes and Boone, LLP, August 2018

The courts in busy art capitals of the world like London are often called upon to determine disputes over title, provenance, authenticity and attribution of valuable art and artefacts...

Brexit: Is Opportunity Knocking for Paris’ New International Chamber of the Paris Court of Appeal?
Haynes and Boone, LLP, February 2018

On 7 February 2018, a new specialist International Chamber within the Paris Court of Appeal was launched by the French Ministry of Justice together with the Paris Bar Association. The chamber is intended to deal with international commercial matters governed by French as well as foreign law, and the use of English as well as certain common law procedures will be permitted...

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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