Tony Concagh


A recognised expert in offshore oil and gas and maritime law. He is also actively involved in the offshore renewables industry. Tony advises a range of industry leaders on new contracts and disputes both in court and in arbitration.

Described by Chambers UK as "totally on the ball and always quick to grasp the situation", he advises on new contracts, commercial disputes and also represents clients in court and arbitration proceedings. He acted on the largest amount ever disputed in a London Maritime Arbitration where his clients successfully defended a US$500 million claim made against them under a drilling contract.

Disputes for the offshore industry include delay, disruption and cost overruns on high value EPIC projects including pipe laying, platform construction and FPSOs, and high value windfarm projects.

On new projects, Tony is often engaged by clients to assist in the drafting of contracts relating to the offshore industry and has been involved in a wide range of negotiations for all kinds of services in many jurisdictions.

Tony has direct experience of contracts relating to seismic survey, drilling, OSV and specialist vessels charterparties, subsea and ROV operations, seabed pipeline and cable laying, subsea construction, transportation and installation of offshore structures, FPSO and FSO operations and field and platform decommissioning.

Tony is also often engaged on drafting contracts and dealing with disputes relating to the construction of high value specialist vessels such as drilling rigs, construction vessels and FPSOs. In recent years, his efforts have led his clients to recover tens of millions of dollars from ailing shipyards.


  • Successfully defending a drilling contractor from the largest ever claim brought before the London Maritime Arbitration Association.

    Acting for sellers prior to delivery of their jack up rig, valued at US$130 million. Buyers disputed that the rig was in the correct condition and location for delivery and demanded that repairs were carried out on an urgent basis. Advising throughout on the sellers rights under the contract.

  • Representing a subsea contractor in bringing multiple delay and disruption claims in excess of US$100 million on the first FPSO development in Brazilian waters. After lengthy investigation and compilation of supporting evidence, established that contractors losses arose largely from the oil company's errors in project management thus the delay was beyond the contractor's control.

  • Acting for a South Korean yard where buyers refused to pay instalments of US$20 million. Pursuing the claim through preliminary stages and assisting in agreeing a satisfactory compromise including obtaining an arbitration award in the yard's favour.

    Acting for a European buyer on the termination of three shipbuilding contracts with Chinese yards on grounds of late delivery and alternatively unacceptable quality. Obtaining three arbitration awards ordering repayment of the buyer's deposits plus interest and costs. Thereafter serving demands on the refund guarantor banks and receiving payment of US$40 million plus all interest due.

    Producing in house terms for a buyer undertaking a major fleet renewal utilising many start up yards. Thereafter drafting modifications to meet the specific local and technical requirements for each new project while maintaining the essence and simplicity required of the standard form.

    Acting for European charterers on their refusal to take delivery of a vessel chartered for eight years on grounds that it failed to achieve its warranted minimum speed during seatrials. Defeated a US$20 million claim brought by the owners.

    Advising charterers on its rights to cancel long term charters on two vessels prior to delivery for failure to meet specification and failure to meet class or industry standards by the incorporation of toxic materials during construction and conversion.

    Acting for a subsea contractor against two international gas companies for delay and disruption caused by severe delays progressing with completion of a pipeline project off Trinidad. Commencing arbitration and negotiating settlement terms favourable to the client.

    Acting for an international marine contractor in relation to its claims made to a major oil company for detention of its heavy lift vessel and marine spread as a result of delay in arrival of the topside package. Settlement was achieved at US$12 million of the actual US$15 million claimed.

  • Advising the turnkey installation contractor on a wide range of issues arising from their £1 billion project to install 100 foundations offshore Scotland.