FCA Targets Three London Sites in Crypto P2P Trading Probe

A joint operation with UK tax and police authorities produced cease-and-desist letters and evidence for continuing investigations, but no announced charges or findings of guilt.

The UK Financial Conduct Authority said a joint operation targeted three London premises as part of an investigation into potentially illegal peer-to-peer cryptocurrency trading.

The September 10 operation involved the FCA, HM Revenue & Customs and the Metropolitan Police, according to an FCA release published September 17, 2026. The regulator said cease-and-desist letters were issued and evidence was gathered for continuing investigations.

The announcement signals active scrutiny of businesses that facilitate direct cryptoasset trades between users. It does not identify the premises or any suspects, announce charges, describe seized assets or establish that a crime occurred.

What the London operation established

The FCA’s statement confirms a narrow but consequential set of facts: three premises in London were targeted; the operation brought together the UK’s financial regulator, tax authority and largest police force; cease-and-desist letters were issued; and evidence obtained during the operation will feed into further investigations.

Those facts show that authorities are examining activity they suspect may fall outside the UK’s registration requirements. They do not reveal what investigators found at each location, whether every person associated with the premises is under investigation or what enforcement step, if any, will follow.

A cease-and-desist letter is an instruction to stop specified conduct. It is not a criminal conviction, a court judgment or proof that its recipient committed an offense. The FCA did not announce arrests, prosecutions, fines or final enforcement findings in connection with the operation.

That distinction matters because an early-stage regulatory announcement can easily be read as a completed case. Here, the evidence remains under investigation. Any later allegation would need to be assessed on its own terms and through the applicable regulatory or judicial process.

Why peer-to-peer trading can trigger FCA oversight

Peer-to-peer crypto trading generally refers to transactions arranged directly between buyers and sellers, rather than through the central order book of a conventional exchange. The label describes a trading method, not an exemption from UK rules.

The FCA said cryptoasset businesses carrying out peer-to-peer services in the UK “by way of business” must register with the regulator. It also said no peer-to-peer crypto businesses are currently registered with it.

That does not mean every private exchange of cryptoassets between two individuals is automatically an unregistered business. The key issue stated by the FCA is whether a party is providing the relevant service in the UK by way of business. The release does not set out the detailed facts investigators would use to apply that test to the activity at the three premises.

The registration requirement is important because it brings covered cryptoasset businesses into the UK’s anti-money-laundering and counter-terrorist-financing supervision. Registration is not an endorsement of an investment, a guarantee against losses or a finding that every activity conducted by the business is low-risk. It is a regulatory threshold for firms carrying on covered activity.

The FCA’s statement that no peer-to-peer crypto businesses are registered also needs careful reading. It describes the regulator’s register at the time of its announcement. It does not establish that all peer-to-peer trading occurring in the UK is unlawful, nor does it resolve whether a particular service is operating “by way of business” without examining its facts.

A coordinated operation, with separate questions still open

The participation of the FCA, HMRC and Metropolitan Police indicates that the inquiry may involve regulatory, tax and law-enforcement considerations. The announcement does not allocate specific allegations to each agency or say that all three have reached the same conclusion about the conduct being examined.

Multi-agency involvement can help authorities assess different parts of a trading operation, including who controlled it, how transactions were arranged and whether the activity fell within applicable registration obligations. That is a description of the investigative questions raised by the operation, not a claim about what the agencies found.

The FCA did not disclose transaction volumes, the cryptoassets involved, the number of customers potentially affected or the period under review. It also did not say whether the targeted activity used cash, bank transfers, online marketplaces or another settlement method. Without those details, the scale and structure of the suspected trading cannot be reliably measured.

What the announcement means for the UK crypto sector

The immediate significance is procedural rather than punitive. The regulator has demonstrated that it is willing to conduct coordinated, on-site activity against suspected unregistered crypto services while continuing to develop the evidentiary record.

For operators, the release underscores that describing a service as peer-to-peer does not by itself place it beyond regulatory review. For customers, it highlights the difference between dealing through an FCA-registered cryptoasset business and interacting with a service whose regulatory status has not been established.

The announcement does not provide evidence of broader effects on crypto prices, market liquidity or the availability of peer-to-peer services across the UK. Any claim that the operation has materially changed those conditions would require separate, time-stamped data.

The next meaningful developments would be a formal FCA enforcement notice, a police charging decision, a court filing or a statement closing the investigation without further action. Additional disclosures could also clarify what conduct was under review and how authorities interpreted the “by way of business” threshold in this case.

Until then, the defensible conclusion is limited: UK authorities conducted a coordinated operation at three London premises, issued cease-and-desist letters and collected evidence for ongoing investigations. The FCA has not announced a final determination of liability.