Andrew Fox

ANDREW FOX’s practice focuses on commercial litigation and international arbitration.

His litigation experience covers a broad spectrum of high-value and business-critical corporate and commercial disputes before the High Court in England and in the courts of many other overseas jurisdictions, principally in the Caribbean. Andrew has particular experience of litigation arising out of, and acting for, major insolvent estates (Lehman Brothers; Kaupthing Bank) and in recent years has acted in many leading cases considering and construing the terms of complex financial derivative products under terms such as the ISDA Master Agreement and other market forms. He also has considerable experience of litigation in the oil and gas and energy sectors, as well as conducting ADR processes arising out of those industries. 

Andrew’s arbitration experience includes acting for clients before tribunals constituted under ICC, LCIA, industry body and ad-hoc rules, and he has conducted such proceedings on behalf of clients as an advocate. He has also advised clients in respect of proceedings under HKIAC and SIAC rules and the rules of the Stockholm Chamber of Commerce. As part of a small team of Sidley arbitration lawyers, Andrew has also provided assistance on a leading pro bono engagement with the U.S. Agency for International Development/Mongolia Business Plus Initiative, advising the Mongolian Ministry of Justice in their development of a new arbitration statute. 

Andrew is recommended in Legal 500 UK 2026 for Banking litigation: investment and retail, Financial services: contentious and Commercial litigation: premium, where clients describe him as “extremely smart, perfectly fitted for non-UK clients and able to fill gaps between different legal cultures and backgrounds.” Praises from previous editions state he is “talented and client/business oriented (2025),” “a stand-out partner in the commercial litigation and arbitration space (2023),”and “an exceptional partner (2022).”

A list of Andrew’s representative matters includes the following:

Litigation 

• Obtaining a substantial eight-figure GBP judgment sum (inclusive of costs and interest) in the Commercial Court of England and Wales for a large private equity fund on a summary judgment application. The case concerned payments of Early Termination Amounts assigned to the Claimant under a series of ISDA Master Agreements with underlying commercial property borrower entities. 
• Obtaining a seven-figure EUR judgment sum following a Commercial Court trial for a large private equity fund in respect of a claim for rectification of an ISDA Master Agreement and associated long-form trade confirmations. 
• Acting for Kaupthing hf as scheme proponent in parallel Schemes of Arrangement in England and the Isle of Man entered into by its wholly owned indirect subsidiary, Murray Holdings Limited. 
• Obtaining a £41 million judgment for Murray Holdings Limited in the Chancery Division of the High Court for rectification of a private equity waterfall provision concerning the correct apportionment of certain proceeds of sale of the Somerfield supermarket group. 
• Acting for a series of entities incorporated in Cyprus and the BVI in relation to litigation before the BVI High Court arising out of a US$1 billion joint venture agreement between two Russian principals and various investment vehicles concerning power generation and distribution assets in Russia and the Ukraine. 
• Acted for the Lehman Brothers parent company, Lehman Brothers Holdings Inc., in several key proceedings in England (at first instance, the Court of Appeal and the Supreme Court) arising out of the largest international bankruptcy in history, including the Client Money, RASCALS and Extended Lien applications brought by the administrators of its English subsidiary Lehman Brothers (International) Europe.
• Acted for Kaupthing hf in a series of £1 billion plus disputes in England, the BVI and Iceland against the bank’s former borrowers involving the enforcement of security rights.

Arbitration 

• Acting for Tecnicas Reunidas in a novel and significant victory before the High Court, which set aside an International Chamber of Commerce (ICC) arbitration award on jurisdictional grounds under section 67 of the Arbitration Act 1996.
• Acting for a BVI-incorporated drilling rig owner/operator in respect of a US$100 million arbitration under LCIA rules (London seat) against Delaware and Nigerian respondents. The matter concerned claims and counterclaims arising out of breaches of an English law contract entered into between the parties in the form of the International Daywork Drilling Contract – Offshore published by the International Association of Drilling Contractors. 
• Acting for a Czech heavy engineering manufacturer, as claimant, in an ICC arbitration (London Seat) relating to a breach of a long-term supply contract for ship engines.
• Acted for a Spanish engineering company, as claimant and counterclaim respondent, in respect of a multi-million dollar construction dispute (ICC, Paris seat).
• Acted for a world-leading multinational pharmaceutical manufacturer in an ICC arbitration, as claimants and counterclaim respondents (Paris seat), involving connected multi-billion dollar multi-party disputes under a suite of global joint venture agreements.
• Acted for a hedge fund administrator, as respondent, in an LCIA arbitration (London seat) in a US$100 million breach of contract and professional negligence claim arising from the collapse of a client fund.
• Acted for a Turkish entrepreneur in an ICC arbitration (London seat) concerning a joint venture investment in, and the management of, a large European chain of discount drugstores.

Some of the above matters were handled prior to joining Sidley.

• Member of Young International Arbitration Group.
• Member of the London Court of International Arbitration.
• Member of the Young Arbitrators Forum of the ICC.