MOX Plant Case (Ireland v. United Kingdom)

The International Bureau served as registry in these arbitration proceedings initiated pursuant to Annex VII of the 1982 United Nations Convention on the Law of the Sea (UNCLOS).


Note: Certain material has either been excised or blacked-out for reasons of confidentiality. Ireland's Memorial and the UK's Rejoinder have been separated into smaller files (segments) enable faster downloading.

Case information

Name(s) of Claimant(s) Ireland (State)
Name(s) of Respondent(s) The United Kingdom of Great Britain and Northern Ireland (State)
Names of Parties -
Case number 2002-01
Administering institution Permanent Court of Arbitration (PCA)
Case status Concluded
Type of case Inter-state arbitration
Subject matter or economic sector Law of the sea
Procedural rules - Other -
Treaty or contract under which proceedings were commenced

Multilateral treaty

Language of Proceeding English
Seat of Arbitration (by Country) - N/A -
Arbitrator(s), Conciliator(s), Other Neutral(s)

H.E. Judge Thomas A. Mensah (President)
Prof. James Crawford, SC 
Maître L. Yves Fortier CC QC
Prof. Gerhard Hafner
Rt Hon. Lord Mustill, PC 

Sir Arthur Watts, KCMG QC (deceased November 16, 2007)

Representatives of the Claimant(s)

Mr. David J. O’Hagan (Agent)
Ms. Christina Loughlin (Deputy Agent)
Ms. Caitlín Ní Fhlaitheartaigh (Deputy Agent)
Mr. Edmund Carroll (Deputy Agent)
Prof. Philippe Sands
Prof. Vaughan Lowe
Mr. Eoghan Fitzsimons

Representatives of the Respondent(s)

Mr. Daniel Bethlehem (Agent)
Sir Michael Wood (UK Agent)
Ms. Jill Barrett (Deputy Agent)
Mr. Doug Wilson (Deputy Agent)
Mr. Richard Plender QC LLD
Mr. Sam Wordsworth

Representatives of the Parties
Number of Arbitrators in case 5
Date of commencement of proceeding 25 October 2001
Date of issue of final award 06 June 2008
Length of Proceedings More than 4 years
Additional notes

These proceedings were terminated by Order No. 6.


Written submission
Ireland Memorial (segment 1)
Ireland Memorial (segment 2)
Ireland Memorial (segment 3)
Ireland Memorial (segment 4)
Ireland Reply
UK Counter-Memorial
UK Rejoinder (segment 1)
UK Rejoinder (segment 2)
Ireland's Request for Provisional Measures
Procedural Documents
Order No. 1
Order No. 2
Order No. 3
Order No. 4
Order No. 5
Order No. 6
Press Release
June 2, 2003
June 17, 2003
June 25, 2003
November 14, 2003
February 21, 2007
June 6, 2008
Rules of Procedure
President's Statement of June 13, 2003
Day 1 - June 10, 2003
Day 2 - June 11, 2003
Day 3 - June 12, 2003
Day 4 - June 13, 2003
Day 5 - June 17, 2003
Day 6 - June 18, 2003
Day 7 - June 20, 2003
Day 8 - June 21, 2003