The Edinburgh Reforms Explained: UK Financial Regulation After Brexit

The Edinburgh Reforms are a package of UK financial services regulatory changes announced in December 2022 by then-Chancellor Jeremy Hunt, intended to replace EU-derived rules with a "smarter, home-grown" regulatory framework following Brexit. By 2026, several strands of the reforms have been implemented while others remain in progress or have been scaled back, making this a useful case study in how post-Brexit regulatory divergence actually plays out in practice.

What the Edinburgh Reforms set out to do

The original announcement covered more than 30 individual measures across banking, insurance, and capital markets regulation. The stated goals were to make UK financial services more competitive internationally, reduce reporting burdens inherited from EU directives, and give UK regulators more flexibility to tailor rules to UK markets rather than following EU templates by default. The reforms sit within a broader shift of regulatory responsibility from EU-retained law toward rules set directly by the Financial Conduct Authority (FCA) and Prudential Regulation Authority (PRA), under the accountability framework set out in the Financial Services and Markets Act 2023.

Ring-fencing reform

One of the most significant strands targeted the ring-fencing regime, which requires large UK banks to separate retail banking from investment banking activities. The Treasury committed to raising the threshold at which ring-fencing applies and allowing greater flexibility for banking groups without significant investment banking activities to exit the regime, reducing structural compliance costs for mid-sized banking groups. Implementation of the detailed ring-fencing threshold changes continued through secondary legislation over 2024–2026, with the practical effect being a gradual loosening rather than a single cutover date.

Short selling and capital markets

The Edinburgh Reforms also set the direction for reforming the UK's short selling disclosure regime, which had been inherited largely unchanged from the EU's Short Selling Regulation. This work fed into the FCA's own short selling reform consultation and rulebook, which moved toward implementation as a distinct workstream rather than staying tied to the original Edinburgh announcement.

Mixed and uncertain implementation track record

Not every measure in the original package has moved at the pace originally promised. Some reforms, such as changes to the Securitisation Regulation and Solvency II (now UK Solvency UK) reform for insurers, were substantially delivered within a year or two. Others, including parts of the wholesale markets review, took considerably longer to work through consultation and secondary legislation, and a small number of measures were quietly deprioritised as the Treasury's regulatory agenda shifted under subsequent chancellors. Industry commentary through 2025 and 2026 has generally characterised the Edinburgh Reforms as a genuine but incomplete deregulatory push, with the most consequential changes being evolutionary adjustments to existing rules rather than the wholesale rewrite some had anticipated at the December 2022 announcement.

Why this matters for finance professionals

For anyone working in UK financial services regulation, the Edinburgh Reforms are a reminder that post-Brexit divergence from EU rules has been more gradual and selective than the original political rhetoric suggested. Firms operating in both the UK and EU need to track separately how UK rules on ring-fencing, short selling, and related capital markets requirements are diverging from the EU's own reform track, including the EU's parallel work covered by the EU Listing Act. Understanding this regulatory relationship is increasingly relevant to the FCA's own Consumer Duty framework, which forms part of the same broader shift toward UK-specific, outcomes-focused regulation.

FAQ

Are the Edinburgh Reforms a single piece of legislation?

No. They are a package of more than 30 separate measures, implemented individually through different pieces of secondary legislation and regulator rulebook changes over several years.

Do the Edinburgh Reforms apply to EU firms operating in the UK?

Yes, where a firm is UK-regulated or has UK-regulated subsidiaries, the relevant UK rule changes apply regardless of where the firm's parent group is headquartered.

Is ring-fencing being abolished?

No. The reforms raise the threshold and add flexibility, but the core ring-fencing requirement for the largest UK banking groups remains in place.

Finance professionals preparing for exams covering UK regulatory frameworks can deepen their understanding through Learnsignal's CPD courses, which track regulatory developments like these as they happen.

Regulator accountability and the new rule-making model

A structural change that outlasted any single Edinburgh Reforms measure is the shift in how UK financial rules get made. Under the Financial Services and Markets Act 2023, large parts of EU-retained financial services law were repealed and replaced with rules set directly by the FCA and PRA under their own rulebooks, rather than by Parliament transposing EU directives. This gave the regulators significantly more day-to-day rule-making power, but it also came with new accountability mechanisms: a secondary objective requiring the FCA and PRA to consider UK competitiveness and growth alongside their existing conduct and prudential objectives, plus enhanced Treasury and parliamentary oversight of how that rule-making power is used. By 2026, this model has become the main channel through which further UK financial regulation diverges from its EU origins, with the Edinburgh Reforms having served largely as the political launchpad for that structural shift rather than as an exhaustive list of every subsequent change.

How this compares to the EU's own reform track

It's worth distinguishing the Edinburgh Reforms from parallel EU initiatives covering similar ground, such as the EU Listing Act. Both the UK and EU have pursued competitiveness-driven deregulation since 2022, but through different mechanisms and timelines: the EU's changes apply uniformly across member states once in force, while the UK's reforms depend on the FCA and PRA exercising their individual rule-making powers at their own pace. For firms operating across both markets, this means UK and EU rules that started from the same EU-derived baseline can now diverge meaningfully in both substance and timing, and tracking each jurisdiction separately has become a standard part of cross-border compliance work.

One concrete example of this UK-specific rule-making in action is the FCA's reformed short selling disclosure regime under PS26/5, which replaced the UK's EU-derived short selling rules with a new two-phase disclosure model through 2026.

The UK's ring-fencing approach contrasts with the US's structurally different Volcker Rule, which bans proprietary trading and fund sponsorship outright rather than structurally separating retail and investment banking within the same group.

Fund regulation is another area of post-Brexit divergence to watch: UK-domiciled funds under the UK's own versions of UCITS and AIFMD no longer automatically benefit from the EU marketing passport, requiring separate arrangements to market into the EU.