UK launches live stablecoin trials in FCA sandbox as BoE proposes holding limits
The UK is taking a cautious, experimental approach to sterling stablecoins: regulators have kicked off live testing of pound-denominated stablecoin use cases inside the Financial Conduct Authority’s (FCA) regulatory sandbox, while the Bank of England (BoE) is separately proposing temporary caps on how much users can hold.
What’s happening
- The FCA’s sandbox will run tightly controlled live trials of stablecoin applications — not public rollouts — to evaluate real-world use cases such as payments, wholesale settlement and crypto trading.
- Four firms have been selected to participate: Revolut, Monee Financial Technologies, ReStabilise and VVTX. Work is expected to begin this quarter.
- Notably, major UK high-street banks are not part of the trials, underscoring continued caution among larger lenders about issuing or distributing stablecoins.
Why regulators are pairing testing with limits
- The Bank of England has proposed temporary caps on holdings of any stablecoins designated as “systemic.” The suggested limits are roughly:
- Individuals: up to about £20,000 per systemic coin
- Businesses: up to about £10 million per systemic coin
- These measures are intended as short-term safeguards to reduce risks such as deposit flight from traditional banks and rapid outflows during periods of market stress. The caps would be revisited as the market develops.
Policy balance: learn first, contain risk
- Together, the sandbox and the BoE’s proposal reveal a deliberate strategy: encourage controlled experimentation to understand benefits (improved payments and settlement efficiency) while imposing guardrails to prevent stablecoins from becoming systemically significant too quickly.
- Regulators remain wary of stablecoins blurring the line between bank deposits and crypto instruments. The BoE has previously urged banks to prioritise tokenised deposits — digital versions of conventional bank deposits — over issuing stablecoins directly.
Market context
- Pound- and euro-denominated stablecoins still represent a small slice of global circulation; dollar-pegged tokens dominate volumes. That limited footprint helps explain why the sandbox is focused on testing safety and interoperability rather than pushing for rapid mass adoption.
Bottom line
The UK’s approach is pragmatic: run closely monitored experiments to learn how sterling stablecoins might fit into the financial system, while using holding limits and other safeguards to contain potential risks during the early stages of adoption.
Disclaimer: AMBCrypto's content is meant to be informational in nature and should not be interpreted as investment advice. Trading, buying or selling cryptocurrencies should be considered a high-risk investment and every reader is advised to do their own research before making any decisions. © 2026 AMBCrypto
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