UK Regulator Moves to Allow Mutual Funds 10% Exposure to Crypto ETNs

The FCA is amending its COLL rulebook to let authorised UK retail funds hold up to 10% of their portfolios in exchange-traded crypto assets, reversing a blanket ban that had kept UK fund managers out of a space already opened up by EU regulators and the US SEC. The change puts roughly £1.4 trillion in UK fund AUM within reach of crypto ETN issuers for the first time. Whether large asset managers actually use the allocation, or leave it sitting on the shelf, will tell most of the story.

The Thesis

This is not a crypto endorsement from the FCA. It is a competitive positioning move. London watched the EU embed crypto asset rules into MiCA and watched the SEC approve 11 spot Bitcoin ETFs in January 2024. Staying on the sidelines was starting to cost the City credibility with international asset managers who want a single regulatory framework they can work within. The 10% cap, matching limits placed on other alternative or illiquid assets in the COLL sourcebook, gives the FCA a defensible consumer protection argument while still opening the door.

The real question is not whether the rule changes. It is whether any of the large UK asset managers, Abrdn, Schroders, Legal and General, move quickly enough to matter, or whether they treat this the way they treated ESG ten years ago: slowly, reluctantly, and then all at once.

Why It Matters

Several distinct groups are affected in meaningfully different ways.

UK retail investors in ISAs and pension-linked funds could gain indirect crypto exposure for the first time without holding digital assets directly or using a specialist platform. For the 12% of UK adults who have held crypto at some point, according to the FCA's own 2024 consumer research, this is a more familiar and regulated entry point. For those who have avoided crypto entirely, it removes the custody question entirely.

Large asset managers face an immediate strategic decision. Using the allocation signals innovation. Ignoring it risks looking behind the curve to institutional clients who are already allocating elsewhere. Firms without dedicated digital asset teams face genuine compliance cost pressure to build the internal infrastructure needed just to evaluate whether to participate.

Crypto ETN issuers including 21Shares, WisdomTree, and ETC Group now have access to a distribution channel they were previously locked out of. There are currently 21 crypto ETNs listed on the London Stock Exchange, with combined AUM of approximately $1.2 billion, per LSE and issuer filings as of Q1 2025. That figure is small relative to what UK fund flows could eventually add.

Custodians such as HSBC Securities Services and Citi face new infrastructure demands. Settling and holding ETNs inside UCITS-equivalent fund structures requires specific operational work that not every custodian has tested at scale.

What Changed

The specific trigger is a policy update the FCA published in Q2 2025, confirming it will amend the Collective Investment Schemes (COLL) sourcebook. The amended rules permit authorised UK funds to hold exchange-traded crypto assets subject to a 10% portfolio cap.

This directly reverses the previous FCA position, which placed a blanket restriction on retail funds taking any direct or indirect exposure to crypto assets. That restriction had been in place for several years and was treated as settled policy until the FCA published its 2024 Crypto Asset Roadmap, which signalled a broader shift toward integrating digital assets into the regulated financial system rather than fencing them off.

The EU's MiCA framework and the US SEC's January 2024 approval of 11 spot Bitcoin ETFs provided the external reference points the FCA could point to when justifying the change to a UK Treasury and Parliament that remain cautious about crypto's systemic risks.

The Evidence

The 10% figure is not arbitrary. It matches the cap the FCA's COLL rulebook already applies to other alternative or less liquid asset classes, giving the change a basis in existing precedent rather than requiring entirely new regulatory logic.

The US comparison is instructive. The SEC approved 11 spot Bitcoin ETFs on January 10, 2024. Within six months, those products attracted more than $50 billion in net inflows, according to Bloomberg Intelligence. That number represents both genuine demand and the speed at which institutional distribution channels can move once regulatory permission is granted.

The UK starting point is smaller. The 21 crypto ETNs currently listed on the London Stock Exchange carry combined AUM of approximately $1.2 billion, per LSE and issuer filings from Q1 2025. That is a fraction of the US market, but the addressable pool shifts significantly once the £1.4 trillion UK authorised fund market, per Investment Association data from end-2024, is technically permitted to allocate.

Consumer awareness is already established. The FCA's own 2024 consumer research found that 12% of UK adults hold or have previously held crypto, suggesting that demand-side familiarity is not the barrier. The barrier has been on the supply side, in fund structures that could not legally touch the asset class.

What to Watch Next

The first signal to watch is whether any major UK asset manager files an updated fund prospectus with the FCA to include crypto ETN exposure within the 10% cap. That step requires board-level sign-off and legal review, meaning any public filing would indicate a genuine operational commitment rather than exploratory interest.

The second is whether ETN issuers, particularly 21Shares, WisdomTree, and ETC Group, announce new product structures specifically designed for inclusion in UCITS-equivalent UK funds. Products marketed directly to fund buyers differ from exchange-listed retail products in their cost structure and redemption terms, so new product launches aimed at fund managers would confirm the distribution opportunity is being pursued seriously.

Third, watch for FCA follow-up guidance or a Dear CEO letter to authorised fund managers clarifying how the 10% limit is measured, whether it applies at the time of purchase or on an ongoing basis, and which categories of crypto ETNs qualify. Ambiguity in implementation details is usually where broad rules either expand in practice or contract.