Please ensure Javascript is enabled for purposes of website accessibility

Post Brexit, the EU and the UK are no longer aligned on policy and rulemaking in respect of financial services. This is leading to divergence in the rules that investment firms must follow. Remaining up to date with regulatory changes becomes therefore even more important and arguably challenging than before.

Explore our insights on how to navigate this new landscape.


The UK's departure from the EU provides a "once in a generation" opportunity to review regulation in areas that were previously subject to EU law and the legislation inherited by the UK after Brexit, which came to be known as "retained EU law" in the jargon, can only be changed if Parliament passes new laws. The UK Government has announced the Brexit Freedoms Bill will change that, by introducing powers to make it easier to amend retained EU law.

Separately, the EU is moving ahead with its own plans. With both jurisdictions following their own regulatory change initiatives, the differences between the EU and UK frameworks are expected to create an additional layer of complexity for market participants active in both markets.


We’ve been messaging that regulatory divergence was coming to our EU and UK clients since Q2 2020 when we saw the first signs in relation to the share trading obligation and refusal to grant the UK equivalence. It’s now over two years since Brexit and divergence is coming through on all new regulations as well as reviews of existing requirements such as MiFID II.

We are seeing that outside of the EU, the UK is working to tailor its rules to suit the UK market’s growth and competitiveness. With the hope of equivalence lost, the UK has moved forward to enact rules that are more pragmatic and generally, remove rules that are not working as expected or are no longer serving a purpose.

Post Brexit, the areas of divergence where we have already seen different approaches implemented are operational resilienceCSDR and the new prudential rules. Other topics that are now in focus are trading, market data, clearing, digital finance, ESG and the Consumer Duty.

How Should Businesses Proceed?

Regulatory divergence is a factor that should be the focus of individuals at both EU and UK firms charged with advising the business on the impact of proposed changes. We need to accept that all new regulations are likely to diverge to some extent as the EU and UK are now separate.

  • There will be common themes and aims for amending existing regulations such as MiFID but the timing for the review and the topics to be revised and amended will differ
  • Deciding the best jurisdictions to locate and invest in has always been a challenge for firms. It is now even more difficult and firms operating across the EU and UK are faced with a unique set of cross-border legal and regulatory challenges. As rules change, boards need to ensure they have the right strategy and operating model – especially across technology and location of people
  • Ensure regulatory change is properly and comprehensively integrated into the business and operating models of your organisation. The C-suite should be central to guiding this process, preparing teams to apply new rules whilst continuing to ensure the best outcome for their clients. Doing so will ensure teams are equipped to respond quickly and in an agile way to future changes coming their way
  • Regulatory transformation programmes should be reviewed in the context of further divergence. Nobody wants to make changes to their business processes only to have to unpick that approach where there is regulatory divergence. Looking ahead and joining up common approaches but also identifying the differences will be key

Pershing Can Help Your Firm Post-Brexit

Pershing is prepared to fully support clients with robust and resilient operations across all our EMEA entities.

As part of BNY Mellon, a global financial institution, and with Pershing EMEA’s strong presence in Ireland, the UK and Jersey, we continue to be well placed to service clients, minimising any potential challenge, turbulence, and disruption to Europe’s capital markets and to our clients, and supporting our clients as they navigate their own Brexit planning:

  • Our flexible operating model enables us to adapt to the developing landscape of European regulation
  • We are well placed to handle potential market volatility and increased volumes of trading as the regulatory divergence process evolves
  • We are strongly positioned to continue to provide services and solutions to our clients
  • The position of our Irish (within the EU), UK and Channel Island regulated legal entities provides Pershing with considerable stability and resilience, as well as optionality for us and our clients as to the choice of booking legal entity; and
  • We continue to follow the European Banking Authority (EBA), the European Central Bank (ECB) and the European Securities and Markets Authority (ESMA) as well as our direct regulators, in order to fully understand the implications of the regulatory changes, and ensure that we are as prepared, strategically, operationally and tactically as possible

Linda Gibson, Head of Regulatory Change (December 2022)

We are seeing regulatory divergence in approach between the UK and the EU on all new key regulations (the new prudential regime for MiFID investment firms, MiFID II reviews, or CSDR to name a few). Differences are subtle but still impactful and the implementation timelines vary, too. We now have two regulators moving in different directions and with different priorities which will have a significant impact on firms who need to be able to integrate the amendments into their wider business strategy and look out for more amendments to be announced as they are drip-fed through.

The majority of relocations of businesses and operational moves were made ahead of the Brexit deadline and before the pandemic but travel restrictions over the last two years have challenged the practicalities of relocation. We are seeing that many financial services firms are still far from being fully ‘post-Brexit’ and the evolving complexity of regulatory divergence means they are taking a watching brief on when and where to co-locate.

We have seen the number of MiFID firms regulated by the CBI increase and Dublin remains well positioned for UK firms to co-locate or relocate and remains a top choice for operational moves. Being established in Ireland enables Irish MiFID firms to provide services across the EEA via the MiFID services passport. In Ireland, the regulatory framework tends to be aligned with the UK on new initiatives. This positions UK firms well to co-locate in Ireland and benefits our Irish clients who can leverage work undertaken in their UK entity.

Ask how we can help transform your business

Additional Resources


Press Releases

The Newsroom is Pershing's central location for press releases, experts, press coverage and contact information.



We are proud to be recognised by industry organisations for our excellence in outsourced solutions and global custody. We continually strive to provide best-in-class services and solutions to help you achieve your goals.