Aidan Casey

Acting for the Kingdom of Sweden in a substantial (ca. €120m) and complex fraud claim, brought under Swedish and Maltese law, arising out of a sophisticated fraud on the Swedish pension system.

Acting for the claimant Nigerian shipowning company in a dispute over the control of an Aberdeen-based ship management company, and an associated arbitration worth US$ several million.

Acting for Dubai-based Swiss banker on appeal in a case involving a €100m fraud on the Allseas Group. An important case as to the test for dishonesty in dishonest assistance, and as to the rules as to remoteness and causation in such cases.

Representing one of the individual defendants in a £2 billion claim for bribery and money laundering brought by Kuwait’s national pension fund. One of the largest fraud disputes ever heard in the Commercial Court, with a trial scheduled to run for some 42 weeks over 2025 and 2026, and featured as one of The Lawyer’s ‘Top 20 Cases’ of 2025. Instructed by Quinn Emanuel Urquhart & Sullivan UK LLP.

Acting for many years for Aeroflot in its litigation against Boris Berezovsky, Nikolai Glushkov, and various corporate defendants, claiming for vast frauds said to have been carried out during the Yeltsin era. Included securing the appointment of Kevin Hellard and Nick Wood as administrators of Berezovsky’s (ostensibly insolvent) estate upon his death.

Acting for the ‘right hand man’ of Eric Watson, in a case involving allegations of dishonest assistance / the Marex tort – raised interesting issues as to Henderson abuse, and ‘quasi-proprietary’ claims.

Acting for the corporate vehicle of the author of the “Fifty Shades” works, in a dispute with its US merchandising licensee.

Acting for Alternative Power Solution Ltd in an appeal to the Privy Council from Mauritius. This case concerned the so-called “fraud exception” in relation to letters of credit.

Acting for the successful respondent minority shareholder in PJSC Orient Express Bank, resisting the grant of an anti-suit injunction sought on the basis that court proceedings by the bank were brought in collusion with the shareholder in order to impede arbitrations between the shareholders.

Advising a group of seven Premier League clubs in relation to potential s994 and related claims, arising out of the Premier League’s proposed scheme for apportioning losses due to rebates payable to broadcasters (running to £ hundreds of millions) following disruption to the season due to COVID-19.

Acting for a Premier League club in a dispute with the Treasury, concerning conditions sought to be imposed on a roll-over of a Coronavirus Large Business Interruption Loan Scheme loan of in excess of £100m.

Shareholder dispute concerns (1) the validity of a large tranche of PIPE shares (a controlling stake if valid) purportedly issued by a board previously found to be imposters by the Privy Council, and (2) the activities of that purported board which resulted in dividends to the Defendants. There are also jurisdictional challenges based upon an arbitration agreement in the SPA under which the purported shares were sold.

Acting for the successful respondents in a Commercial Court challenge to an arbitral award which had granted final anti-suit relief. Important decision on the arbitrability of certain company law disputes.

Representing one of the individual defendants in a £2 billion claim for bribery and money laundering brought by Kuwait’s national pension fund. One of the largest fraud disputes ever heard in the Commercial Court, with a trial scheduled to run for some 42 weeks over 2025 and 2026, and featured as one of The Lawyer’s ‘Top 20 Cases’ of 2025. Instructed by Quinn Emanuel Urquhart & Sullivan UK LLP.

Acting for the defendant in proceedings that formed part of a bitter and long running dispute between the heirs of a wealthy Venezuelan oil family. Involving allegations of misuse of a PoA granted by the mother, in order to misappropriate funds held in a Swiss bank account.

Acting for a management company which manages certain commercial rights on behalf of Team England (at any one time, the cadre of football players who play at the international level), in a claim against the FA for various forms of tortious interference.

Acting for a property investment SPV in a dispute raising interesting questions about the ability of a beneficiary to ‘cherry-pick’ where there has been a breach of fiduciary duty and the fiduciary has deployed the relevant funds profitably.

Acting for Chinese investors in a dispute concerning the management of a Cayman Islands holding company, arising out of a director (nominated by another major investor) frustrating a US IPO valued at in excess of $ 2 billion.

Separate Commercial Court challenge to an arbitral award, raising issues as to the possibility of a shareholder acceding to an arbitration agreement by a unilateral deed of adherence.

Acting for the successful claimant seeking final anti-suit injunctive relief from an arbitral tribunal, restraining proceedings brought in Cyprus by the respondent, in breach of an arbitration clause in a shareholders’ agreement (Cypriot proceedings were framed as brought by reference to the Cypriot SPV’s articles of association).

Acting for Alternative Power Solution Ltd in an appeal to the Privy Council from Mauritius. This case concerned the so-called “fraud exception” in relation to letters of credit.

Acting for the ERT, in an appeal to the Privy Council concerning a challenge to its award concerning a large-scale redundancy of hospital employees by a healthcare business.

Acting for the appellant in a Bahamian appeal concerning liability for contamination of groundwater due to leakage from a petrochemical facility. This case raises important issues as to the proper interpretation of s23 of the Court of Appeal Act of The Bahamas, conferring leave to appeal as of right in certain cases.

Acting for the Employment Relations Tribunal of Mauritius in an appeal concerning the correct treatment of delay in applications to that tribunal.

Acting for the Ministry of Housing and Lands of Mauritius in an appeal concerning the doctrine of the condition suspensive in Mauritian law.

Acting for and advising the government of The Bahamas (CA and Privy Council) in an appeal concerning restraint orders and associated relief granted following MLAT requests by the US DOJ, following a substantial fraud against Boeing in the USA.

Acting for Cellplus Mobile Communications Ltd, a subsidiary of Mauritius Telecom Ltd, in an appeal to the Privy Council concerning a substantial damages award (554m rupees) for concurrence deloyale (essentially unlawful competition), based upon alleged breaches of licence conditions arising out of cross-subsidisation by the parent.

Acting for the government of The Bahamas in an appeal arising out of a dispute concerning objections to a marina development in Abaco, on environmental grounds. The judgment gives important guidance on the availability of security for costs in public law disputes.

Acting for the Fair Rent Tribunal of Mauritius in an appeal concerning the correct approach to the determination of fair rent.

Acting for a Bahamian property investor in an appeal concerning constructive trusts and the application of Stack v Dowden in The Bahamas, in relation to investment properties.

Acting for the successful respondents in a Commercial Court challenge to an arbitral award which had granted final anti-suit relief. Important decision on the arbitrability of certain company law disputes.

Acting for a MENA state petroleum company in a dispute concerning the provision of services (and raising issues of dishonesty and ostensible authority / attribution) under a well services contract relating to oilfield drilling operations in Iraq.

Acting for the successful respondent minority shareholder in PJSC Orient Express Bank, resisting the grant of an anti-suit inunction sought on the basis that court proceedings by the bank were brought in collusion with the shareholder in order to impede arbitrations between the shareholders.

Acting for the respondent in an ad hoc arbitration seated in Mauritius, on an application to the Supreme Court (Designated Court) of Mauritius to challenge the arbitral award on several bases provided for in the Model Law.

Separate Commercial Court challenge to an arbitral award, raising issues as to the possibility of a shareholder acceding to an arbitration agreement by a unilateral deed of adherence.

Acting for the respondent in an arbitration concerning a dispute between a large scale industrial battery supplier / user, and a provider of battery recycling services.

Acting in an arbitration of a complex shareholders’ dispute, concerning a Cypriot holding company ultimately owning one of the largest open cast coal mines in Siberia.

Acting for the successful claimant seeking final anti-suit injunctive relief from an arbitral tribunal, restraining proceedings brought in Cyprus by the respondent, in breach of an arbitration clause in a shareholders’ agreement (Cypriot proceedings were framed as brought by reference to the Cypriot SPV’s articles of association).

Acting for the government of The Bahamas in urgent proceedings in The Bahamas seeking to restrain offshore drilling by Bahamas Petroleum Company Plc under an oil exploration licence granted by the government.

Acting for Alternative Power Solution Ltd in an appeal to the Privy Council from Mauritius. This case concerned the so-called “fraud exception” in relation to letters of credit.

Acting for the Bermuda Police Commissioner in litigation in Bermuda concerning the protocol to be adopted in relation to potentially privileged material seized under MLAT legislation in conjunction with a very substantial US DOJ tax fraud investigation.

Acting for the ERT, in an appeal to the Privy Council concerning a challenge to its award concerning a large-scale redundancy of hospital employees by a healthcare business.

Acting for the appellant in a Bahamian appeal concerning liability for contamination of groundwater due to leakage from a petrochemical facility. This case raises important issues as to the proper interpretation of s23 of the Court of Appeal Act of The Bahamas, conferring leave to appeal as of right in certain cases.

Acting for the Employment Relations Tribunal of Mauritius in an appeal concerning the correct treatment of delay in applications to that tribunal.

Acting for the Ministry of Housing and Lands of Mauritius in an appeal concerning the doctrine of the condition suspensive in Mauritian law.

Acting for Chinese investors in a dispute concerning the management of a Cayman Islands holding company, arising out of a director (nominated by another major investor) frustrating a US IPO valued at in excess of $ 2 billion.

Acting for the respondent in an ad hoc arbitration seated in Mauritius, on an application to the Supreme Court (Designated Court) of Mauritius to challenge the arbitral award on several bases provided for in the Model Law.

Acting for and advising the government of The Bahamas (CA and Privy Council) in an appeal concerning restraint orders and associated relief granted following MLAT requests by the US DOJ, following a substantial fraud against Boeing in the USA.

Acting for Cellplus Mobile Communications Ltd, a subsidiary of Mauritius Telecom Ltd, in an appeal to the Privy Council concerning a substantial damages award (554m rupees) for concurrence deloyale (essentially unlawful competition), based upon alleged breaches of licence conditions arising out of cross-subsidisation by the parent.

Acting for the government of The Bahamas in an appeal arising out of a dispute concerning objections to a marina development in Abaco, on environmental grounds. The judgment gives important guidance on the availability of security for costs in public law disputes.

Acting for the Fair Rent Tribunal of Mauritius in an appeal concerning the correct approach to the determination of fair rent.

Acting for a Bahamian property investor in an appeal concerning constructive trusts and the application of Stack v Dowden in The Bahamas, in relation to investment properties.

Advising a group of Kazakh claimants, including an ex Prime Minister, on claims arising out of corruption and state sponsored expropriation of assets by a former son-in-law of the President.

Acting for the largest shareholder in Petropavlovsk Plc, in a derivative action seeking urgent injunctive relief, concerning a threatened sale at an undervalue of the company’s 29% shareholding in a Hong Kong listed Russian iron ore company.

Acting for defendant in a dispute over the purported dissolution of a successful UAE architectural practice. Involved complex jurisdictional / conflicts issues, including as to the identification of the seat of the partnership and as to the implied reflexive effect of Article 24 of Brussels Recast.

Acting in a series of six international arbitrations in a dispute between the shareholders in a large Russian retail bank, concerning a large number of complex issues centred around the exercise of a call option over a controlling stake. Case described in The Moscow Times as a “high-profile case which rocked Russia’s business community and spooked both foreign and Russian investors alike” and as “the most high-profile business dispute of recent years”.

Acting for an offshore SPV in an important case concerning the true scope of the POCA legislation, and in particular establishing that disputes about corporate personality / the corporate veil, and about beneficial ownership of property, fall to be dealt with in accordance with the general law including as to sham trusts, and resulting and constructive trusts.

Acting for and advising the government of The Bahamas (CA and Privy Council) in an appeal concerning restraint orders and associated relief granted following MLAT requests by the US DOJ, following a substantial fraud against Boeing in the USA.

Acting for the Bermuda Police Commissioner in litigation in Bermuda concerning the protocol to be adopted in relation to potentially privileged material seized under MLAT legislation in conjunction with a very substantial US DOJ tax fraud investigation.

Acting for a prominent Omani businessman in a claim for US$ several hundred million, arising out of alleged unauthorised dealings in Iranian oil by his JV partner, a prominent Greek shipowner. Also acting for him on his related OFAC delisting petition (in order to remove his listing as a specially designated national).

Advising a major London-listed sanctioned entity on the potential application of its asset disclosure obligations under the Russia (Sanctions) (EU Exit) Regulations 2019, to assets belonging to its subsidiaries.

Advising a prominent Middle Eastern businessman, who had been designated pursuant to Executive Order 13224, for having allegedly dealt in Iranian oil, on an OFAC delisting petition.

Advising a major London-listed sanctioned entity on whether the delisting of a subsidiary from the MOEX exchange would involve a breach of its obligations under the Russia (Sanctions) (EU Exit) Regulations 2019.

Advising and acting for a prominent African politician and businessman, who had been designated by the OFAC as a narcotics kingpin under the Foreign Narcotics Kingpin Designation Act, on an OFAC delisting petition.

Acting for the respondent crypto investor and offshore companies in a substantial s994 petition, in a hard fought and complex dispute concerning “Coinomi”, said to be the first multi-chain wallet, and the broadest non-custodial wallet (supporting more than 125 blockchains). The case involved substantial issues concerning the tracing of a very large number of movements of a wide range of high value coins and tokens.

Acting for a major cryptocurrency exchange in a large claim by a depositor, which claimed to have suffered substantial losses following a phishing attack on the depositor.

Advising major cryptocurrency exchange. Aidan has regularly advised one of the earliest established and largest cryptocurrency exchanges on a wide range of business issues and disputes

Acting for a major cryptocurrency exchange in a claim by a well known crytpo investor, who claimed that by virtue of holding certain BTC/XRP derivatives, he was entitled (by contract or trust) to 902.109 BCH, following the hard fork that created BCH. This dispute involved in particular issues about the technical and juridical mechanics behind the creation of BTC/XRP derivatives.

Acting for a major cryptocurrency exchange in a claim by a customer following a hack of the exchange, resulting in the theft of some 20,000 BTC

Acting for Alternative Power Solution Ltd in an appeal to the Privy Council from Mauritius. This case concerned the so-called “fraud exception” in relation to letters of credit.

Acting for joint provisional liquidators of an umbrella company, in substantial claim (ca. £30m) against the directors and their associates, seeking freezing and passport orders, and urgent ex p. s234 and s236 orders against law firms involved in various transactions using company funds.

Acting for respondents to an application by the administrators of two insolvent insurance intermediaries, for directions relating to the distribution of money held in client accounts. The case involved complex questions as to the interpretation and application of the statutory trust regime in the FCA Handbook, CASS5.

Acting for the successful petitioner, resisting an application to strike out a winding up petition on the grounds of alleged fraud and breaches of regulatory requirements in the social housing sector.