Case Details

Estate of Ian Colin Orr-Ewing and others v. United Mexican States (ICSID Case No. ARB/25/30)

Subject of Dispute:

Mining
Economic Sector:

Oil, Gas & Mining
Instrument(s) Invoked:

BIT United Kingdom of Great Britain and Northern Ireland - Mexico 2006
Applicable Rules:

ICSID Convention - Arbitration Rules

(a) Original Proceeding

Claimant(s)/Nationality(ies):

Estate of Ian Colin Orr-Ewing (British), Francis Ian Lance Orr-Ewing (British), Robert James Orr-Ewing (British), Christopher Charles Fisher (British)
Respondent(s):

United Mexican States (Mexican)
Date Registered:

June 27, 2025

Party Representatives

Claimant(s):

McCarthy Tétrault, Montreal and Toronto, Canada
Respondent(s):

Tereposky & DeRose, Ontario, Canada
Pillsbury Winthrop Shaw Pittman, Washington, D.C., U.S.A.
Dirección General de Consultoría Jurídica de Comercio Internacional, Secretaría de Economía, Mexico City, Mexico
Status of Proceeding:

Pending
Latest Development:

February 18, 2026 -
Following appointment by the Respondent, Jorge E. Viñuales (Argentine/Swiss) accepts his appointment as arbitrator.

(b) Consolidation Proceeding

Applicant(s)/Requesting Party(ies):

Respondent(s)
Date Registered:

September 25, 2025
Date of Constitution of Tribunal:

November 24, 2025

Composition of Tribunal

President:

Eduardo ZULETA (Colombian)
Arbitrators:

Stephen L. DRYMER (Canadian)
Pierre MAYER (French)

Initial Composition of Tribunal

President:

Eduardo ZULETA (Colombian)
Arbitrators:

Donald DONOVAN (U.S.)
Pierre MAYER (French)
Reconstituted:

July 1, 2026: Stephen L. DRYMER (Canadian) appointed following the arbitrator's resignation of Donald DONOVAN (U.S.)

Party Representatives

Language(s) of Proceeding:

English,Spanish
Status of Proceeding:

Pending
Latest Development:

July 23, 2026 - The Consolidation Tribunal issues Procedural Order No. 2 concerning procedural matters.

No References Available.

(a) Original Proceeding

Date	Development
June 27, 2025	The Secretary-General registers a request for the institution of arbitration proceedings.
August 12, 2025	Following appointment by the Claimants, Stanimir Alexandrov (Bulgarian) accepts his appointment as arbitrator.
February 18, 2026	Following appointment by the Respondent, Jorge E. Viñuales (Argentine/Swiss) accepts his appointment as arbitrator.

(b) Consolidation Proceeding

Date	Development
September 25, 2025	The Respondent files a request for consolidation pursuant to Article 14 of the of the Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United Mexican States for the Promotion and Reciprocal Protection of Investments.
November 24, 2025	A Consolidation Tribunal is established in accordance with Article 14 of the of the Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United Mexican States for the Promotion and Reciprocal Protection of Investments. Its members are: Eduardo Zuleta Jaramillo (Colombian), President, Donald Francis Donovan (U.S.) and Prof. Pierre Mayer (French).
November 27, 2025	The Respondent files a request for suspension.
December 5, 2025	The Claimants filed observations on the Respondent’s request for suspension.
December 11, 2025	The Consolidation Tribunal issues a decision on the Respondent’s request for suspension.
January 14, 2026	The Consolidation Tribunal issues Procedural Order No. 1 concerning procedural matters.
January 24, 2026	The Respondent files a memorial on consolidation.
March 14, 2026	The Claimants file a statement of defence.
April 2, 2026	Following the resignation of arbitrator Donald Francis Donovan, there is a vacancy on the Consolidation Tribunal.
April 6, 2026	Following the resignation of arbitrator Donald Francis Donovan, the other arbitrators suspend the proceeding.
July 1, 2026	A Consolidation Tribunal is reconstituted in accordance with Article 14 of the of the Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United Mexican States for the Promotion and Reciprocal Protection of Investments. Its members are: Eduardo Zuleta Jaramillo (Colombian), President, Stephen L. Drymer (Canadian) and Prof. Pierre Mayer (French).
July 23, 2026	The Consolidation Tribunal issues Procedural Order No. 2 concerning procedural matters.