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Matthew Weiniger KC

Dispute Resolution Partner, Global Chair of International Arbitration, London

“I have focused on international arbitrations for 25 years. I am an experienced advocate, have a good record of advising on the most effective strategy for securing the best results and combine detailed knowledge of international arbitration procedural rules with an ability to adapt to local cultural and practical requirements in many countries.”


Professional experience

Education and qualifications


As the firm’s global co-head of international arbitration, Matthew specialises in international arbitrations, public international law, and trade law. He also advises on non-contentious matters involving the protection of investments under public international law. He has particular expertise in investment treaty arbitrations. Matthew regularly represents parties in proceedings before the English Commercial Court whereby arbitral awards are challenged under the applicable provisions of the English Arbitration Act 1996.

Matthew has conducted numerous international arbitrations, both ad hoc and institutional (including under International Centre for Settlement of Investment Disputes (ICSID), International Chamber of Commerce (ICC), London Court of International Arbitration (LCIA), Hong Kong International Arbitration Centre (HKIAC) and Singapore International Arbitration Centre (SIAC) rules), in cases arising from all major industry sectors, in particular energy and financial services. Much of Matthew’s experience has been gained in emerging markets.

Matthew co-heads the team writing Arbitration Links, the firm’s arbitration blog with insights, updates and news from the firm’s arbitration experts.

Work highlights

Matthew has led on many significant arbitrations. Those that can be disclosed include:

  • representing Malaysia in its successful arbitration against Singapore arising out of the Railways Lands Affair. The value of the dispute was over US$1.5bn and the matter was heard under the Permanent Court of Arbitration Optional Rules for arbitrating disputes between two states
  • acting for Eurotunnel in Eurotunnel v France and Great Britain (a Permanent Court of Arbitration-administered arbitration). Eurotunnel succeeded in its claim against Great Britain and France for breaches of it concession agreement and the treaty under which the concession was granted. The breaches arose out of the problems Eurotunnel faced in relation to clandestine migrants and the Sangatte hostel
  • representing United Utilities (Tallinn) and ASTV (ICSID Case No. ARB 14/24) on a bilateral investment treaty claim before ICSID against the Estonian government arising out of a water privatisation
  • acting for a professional services consultancy in an ICC arbitration whereby it was asserting claims against the international network to which it belonged
  • acting in a long-running LCIA arbitration arising out of the ownership of a shopping centre in Kiev. The matter has given rise to multiple arbitration hearings and challenges to awards before the English High Court
  • representing Standard Chartered Bank and a subsidiary in three separate ICSID arbitrations arising out of the financing of a power station in Tanzania

Professional experience

Matthew is a member of the UK committee of the International Chamber of Commerce, a member of the committee of, an acclaimed service published by Oxford University Press for both practitioners and academic users, and an editorial board member of Global Arbitration Review.

Matthew lectures on matters connected to arbitration and public international law. He is co-author of the world’s leading investment arbitration text, International Investment Arbitration: Substantive Principles, published by Oxford University Press (second edition, 2017), together with Professor Campbell McLachlan QC and Laurence Shore.

Education and qualifications

Matthew studied law at Downing College, Cambridge University.

He speaks English, and has some knowledge of French and Spanish.