ICSID - International Centre for Settlement of Investment Disputes

05/08/2026 | Press release | Distributed by Public on 05/08/2026 17:51

Lansdowne Oil & Gas PLC and Lansdowne Celtic Sea Limited v. Ireland (ICSID Case No. ARB/26/21)

Lansdowne Oil & Gas PLC and Lansdowne Celtic Sea Limited v. Ireland (ICSID Case No. ARB/26/21)

  • Subject of Dispute:
    Oil and gas enterprise
  • Economic Sector:
    Oil, Gas & Mining
  • Instrument(s) Invoked: (i)
    ECT (Energy Charter Treaty)
  • Applicable Rules:
    ICSID Convention - Arbitration Rules

(a) Original Proceeding

  • Claimant(s)/Nationality(ies): (i)
    Lansdowne Oil & Gas PLC (British), Lansdowne Celtic Sea Limited (British)
  • Respondent(s):
    Ireland (Irish)
  • Date Registered:
    May 8, 2026

  • Party Representatives

  • Claimant(s):
    Mantle Law (UK), London, U.K.
    Diamond McCarthy, Washington, D.C. and Houston, TX, U.S.A.
  • Respondent(s):
    Chief State Solicitor, Dublin, Ireland
  • Status of Proceeding:
    Pending
  • Latest Development:
    May 8, 2026 -

    The Acting Secretary-General registers a request for the institution of arbitration proceedings.

No References Available.

(a) Original Proceeding

Date Development
May 8, 2026

The Acting Secretary-General registers a request for the institution of arbitration proceedings.

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