Search

How can we help?

Icon

Companies Act and Brexit – practical considerations

UK companies need to review the impact of Brexit on their governance arrangements

Governance rules are principally found in the Companies Act 2006 which is part of UK domestic law.  For the most part, leaving the EU will have little impact on the way UK limited companies are required to operate under this Act.  There are, however, some important changes that companies need to know.

The EU cross border merger regime, which enables a UK company to merge with a company from an EEA (European Economic Area) state, will cease to apply from 1 January 2021.

The Accounts and Reports (Amendment) (EU Exit) Regulations 2019 will amend certain accounting rules under the Companies Act 2006.  The definitions of micro, medium and large companies for determining which accounting documents need to be filed at Companies House are changing.  Accounting exemptions may no longer apply to UK companies with an EEA parent.  The ability for a UK company with an EEA parent to file dormant accounts will also be restricted.

The Companies House filing requirements for UK companies with EEA corporate directors or company secretary are also changing. Companies House will require further information for these officers, including how they are legally constituted and confirmation of the law under which they are governed.

The EU cross border merger regime, which enables a UK company to merge with a company from an EEA (European Economic Area) state, will cease to apply from 1 January 2021.

Immediate action points on Companies Act for UK companies 

  • Those UK companies that comprise part of a group, where part of that group sits in the EEA, should take accounting advice to understand the impact of Brexit on the production of group accounts and financial statements
  • Company secretaries, or directors generally, should consider their board composition to identify if any further reporting is required for their overseas corporate officers
  • UK companies should check the beneficial ownership of stakeholders who hold more than 25% of the company where those owners sit in the EEA to ensure all reporting obligations are being complied with.

Disclaimer
This information is for guidance purposes only and should not be regarded as a substitute for taking legal advice. Please refer to the full General Notices on our website.

Author profile

About this article

Read, listen and watch our latest insights

art
  • 03 November 2026
  • Commercial Real Estate

Ban on upwards-only rent reviews: What can landlords of 1954 Act protected leases do?

The commencement of the English Devolution and Community Empowerment Act (the Act) poses a real threat to the interests of landlords whose business tenants are protected under the Landlord and Tenant Act 1954 (LTA) (as well as those that are outside the LTA).

art
  • 29 October 2026
  • Immigration

UK Immigration shake-up: More flexibility for skilled workers, but at what cost?

The UK Government has outlined further changes to its immigration system, with new measures affecting international graduates, sponsored workers, and businesses employing overseas talent.

art
  • 28 October 2026
  • Privacy and Data Protection

Remote working: 5 key data protection risks for employers

Remote working has become more prominent in modern business. While flexible working arrangements can improve productivity and employee wellbeing, they also create new data protection risks. Regardless of the physical location in which work is done, compliance with UK GDPR does not change.

art
  • 27 October 2026
  • Employment

Fire and Rehire update: Key changes delayed

The Government has published two documents giving key updates to the anticipated changes around ‘fire and rehire’ and restricted contractual variations, coming about as a result of the Employment Rights Act 2025 (“ERA 2025”). We now understand that these changes will now be delayed to March, rather than January 2027.

art
  • 26 October 2026
  • Corporate and M&A

Shareholders’ Agreements for Founders and Investors – SHA Series Part 3 of 5

A shareholders’ agreement is arguably one of the most valuable corporate governance agreements (along with articles of association) in any private UK company with more than one shareholder.

art
  • 23 October 2026
  • Litigation and dispute resolution

Section 172 Companies Act 2006: Key lessons from Saxon Woods v Costa

The Supreme Court’s decision in Saxon Woods v Costa UKSC 21 clarifies directors’ duties under Section 172 Companies Act 2006, confirming that good faith requires both honest belief and appropriate conduct.