Bank of England and FCA publish joint framework for systemic stablecoin issuers

The Bank of England and the Financial Conduct Authority (FCA) have released a joint paper setting out how the two regulators, alongside other relevant authorities, will co-regulate stablecoin issuers that are designated systemic in the United Kingdom. The document divides supervisory responsibilities between the institutions and explains the pathway by which a stablecoin issuer currently under FCA oversight would transition to the joint regulatory regime once HM Treasury formally recognises it as systemic.

The publication is framed explicitly as a clarity measure, intended to give firms a predictable picture of the regulatory landscape as the stablecoin market matures. For issuers, the operative signal is that scale triggers a supervisory handoff: growth to the point of systemic designation does not merely add requirements, it changes the regulatory relationship itself and brings the central bank into direct oversight.

What to watch is the HM Treasury designation mechanism, which the paper identifies as the gateway event. Firms planning stablecoin issuance in the UK at any meaningful scale should treat that designation threshold as a material structural variable, since crossing it restructures the compliance counterparty and likely the substantive obligations that follow.