British Trader Sues BitMEX for £20 Million Over Derivatives Sold Without FCA Approval

Published October 14, 2026, 09:15 UTC. Based on reporting from The Guardian, FinTelegram, TokenPost and UKPulse.

British software engineer Lewis Barber has filed a £20 million claim in the High Court against HDR Global Trading Limited, the Seychelles-based company behind the now-defunct cryptocurrency derivatives exchange BitMEX, according to a report published by The Guardian on October 14. Barber alleges he lost Bitcoin worth approximately £20 million while trading leveraged cryptocurrency derivatives on BitMEX between 2018 and 2022, and argues the exchange provided regulated financial services to UK customers without authorization from the Financial Conduct Authority (FCA), according to The Guardian and FinTelegram.

The £20 million restitution argument

Barber's legal argument rests on the U.K.'s Financial Services and Markets Act 2000. Under Section 26 of the Act, agreements made by unauthorized persons while carrying on regulated activities in breach of the general prohibition are unenforceable against the other contracting party, and the law provides a statutory basis for recovering money or property transferred under such agreements, according to FinTelegram. Barber is seeking the return of his lost Bitcoin or equivalent damages, about $26.5 million at current exchange rates, according to TokenPost. The proceedings have reportedly been filed but had not yet been served on HDR Global Trading, and BitMEX has stated that no such claim has been served on the company, according to FinTelegram. The allegations remain untested in court. Barber's lawyers have suggested he may be one of thousands of non-professional UK investors with similar claims, according to UKPulse.

The FCA warning that sat on the record

The regulatory background strengthens the claim. In March 2020, the FCA published an explicit warning stating it believed BitMEX might be providing financial products or services in the UK without authorization, identifying the exchange as an unauthorized firm targeting UK customers, according to FinTelegram. The warning remains publicly available on the FCA website. The FCA then banned the sale, marketing and distribution of certain crypto derivatives to retail consumers, effective January 6, 2021. Barber's reported trading losses span both periods, and the statement of claim says BitMEX ran international promotional campaigns without excluding the UK and even placed advertising in The Times in January 2019, according to FinTelegram. Whether the relevant transactions legally constituted regulated activities carried on in the UK, and whether BitMEX had an applicable authorization or exemption, will be central questions for the court.

A decade of BitMEX regulatory trouble

The lawsuit arrives after years of regulatory controversies surrounding BitMEX. In August 2021, the U.S. Commodity Futures Trading Commission announced a $100 million civil penalty against BitMEX entities over the operation of an unregistered cryptocurrency derivatives trading platform and anti-money laundering failures, according to FinTelegram. In July 2024, HDR Global Trading pleaded guilty in the United States to violating the Bank Secrecy Act by failing to maintain an adequate anti-money laundering programme, and in January 2025 the company was sentenced to a further $100 million fine and two years of probation. BitMEX co-founders Arthur Hayes, Benjamin Delo and Samuel Reed had previously pleaded guilty to related Bank Secrecy Act offences and received presidential pardons from Donald Trump in March 2025. The company subsequently announced the voluntary closure of its exchange, with all trading services ceasing on September 23, 2026, a decision it attributed to a strategic review while denying that legal or regulatory issues caused it. The new UK proceedings involve different legal claims from the earlier U.S. enforcement actions, but they highlight a different type of regulatory exposure: civil restitution claims, which can transfer money or assets back to individual customers, rather than penalties paid to authorities.

The question that could haunt offshore exchanges

The case raises a question that reaches beyond BitMEX. For years, offshore crypto exchanges offered highly leveraged trading products to customers across multiple jurisdictions, and authorizations, geographic restrictions and customer classifications were not always aligned with the services actually provided, according to FinTelegram. If Barber's argument succeeds, it could open the door to restitution claims against other offshore exchanges that offered regulated derivatives across borders. Recovery is not automatic: Section 28 of FSMA gives courts discretion to permit enforcement or retention of transferred assets where justified, and questions of territorial jurisdiction, contractual arrangements, limitation periods and the calculation of recoverable losses may prove decisive. An exchange may shut down its trading operations, pay regulatory fines and disappear from the market, but its contractual liabilities do not necessarily disappear with it. The critical question is no longer only whether an exchange operated without a licence, but whether customers can make that violation financially enforceable in court.

This article is news reporting and is not investment advice.

Sources

• The Guardian, primary source for the £20 million claim, the High Court filing, and Lewis Barber's allegations
• FinTelegram, secondary source for the FSMA 2000 legal analysis, the March 2020 FCA warning, the retail derivatives ban timeline, and BitMEX's regulatory history
• TokenPost, secondary source for the $26.5 million equivalent figure
• UKPulse, secondary source for the lawyers' claim that thousands of UK investors may hold similar claims