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Brexit@9: 9 Customs & Trade Lessons

Nine years post-Brexit, the UK & EU are reconnecting—have you learned your lessons? Here are our Top 9!


EU-UK Brexit graphic with EU and UK flag elements forming "19". Text reads "EU-UK BREXIT TRADE LESSONS LEARNED" on beige background.
Nine years after Brexit, the UK and EU reflect on key trade lessons as they work towards strengthening their relationship. Here are the top 9 insights.

Have you, as a business, truly learned your lessons from Brexit?Nearly a decade has passed since the Brexit referendum reshaped the UK’s position on the global trade stage. While the political shouting may have faded, the practical challenges have not. Trade rules continue to evolve. Customs processes shift and expand. And crossing the Channel is still anything but straightforward.


For customs professionals, importers, exporters, and compliance officers, Brexit hasn’t been a one-time disruption—it’s an ongoing reality. Each year since 2016 has introduced fresh complexities, new regulations, and unexpected hurdles.


We’ve now entered a new phase: one of refinement, re-engagement, and long-term adjustment. Brexit is no longer an event. It’s a condition—a new baseline for trade that demands strategic management and constant vigilance.


In this blog, we highlight our top 9 lessons that every business must learn to thrive in the post-Brexit trade environment.

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The 9 Trade Lessons Covered in This Blog

  • Customs Declarations Are Here to Stay

  • Rules of Origin Matter More Than Ever

  • Understanding Tariff Codes Is Essential

  • The Cost of Non-Compliance Is High

  • Border Delays Impact Supply Chains

  • Dual Regulation Requires Extra Effort

  • VAT Rules Changed Dramatically

  • The Importance of Customs Expertise

  • Trade Agreements Are Not Automatic Benefits


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“Brexit didn’t end with a referendum; it began with it. We are still navigating the consequences, and every trader, customs agent, and compliance officer must learn, adapt, and act. The lesson? Trade is still possible—but only for the well-prepared.”—Arne Mielken, Managing Director, Customs Manager


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Nine Customs & Trade Lessons Since Brexit


  1. Customs Declarations Are Here to Stay

    In the wake of recent trade changes, businesses have swiftly adapted to the reality that engaging in trade with the European Union now necessitates comprehensive customs declarations, akin to the requirements for trading with nations outside the EU. This shift has transformed the landscape of international trade for many companies, mandating a more meticulous approach to documentation and compliance. The necessity of full customs declarations underscores the importance of understanding the nuances of trade regulations and the implications they have on operational efficiency and cost management. As businesses navigate this new terrain, they must invest in training and resources to ensure that their customs declarations are accurate and timely, thereby avoiding potential disruptions and penalties.


  2. Rules of Origin Matter More Than Ever

    In order to take full advantage of the zero tariffs offered under the Trade and Cooperation Agreement (TCA), companies are now required to meticulously document and prove the origin of their goods. This process, known as rules of origin, has become increasingly complex and is often fraught with misunderstandings. Companies must delve into the specifics of their supply chains to ascertain where their products are sourced, which can involve detailed tracking of materials and manufacturing processes. Failure to comply with these regulations can result in hefty tariffs being imposed, negating any financial benefits that might have been gained from the agreement. Thus, understanding and navigating the intricacies of rules of origin has become a critical component of strategic planning for businesses engaged in cross-border trade.


  3. Understanding Tariff Codes Is Essential

    The accurate classification of goods using Harmonised System (HS) codes has emerged as a vital aspect of international trade compliance. Each product must be assigned the correct tariff code, as misclassification can lead to a range of negative consequences, including significant delays in customs clearance, financial penalties, and even the seizure of goods at the border. The complexity of the tariff code system necessitates a thorough understanding of the classification process, as businesses must ensure that they are not only compliant but also optimizing their tariff liabilities. As such, investing in training or expert consultation on HS codes can serve as a safeguard against the pitfalls of misclassification.


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  1. The Cost of Non-Compliance Is High

    The repercussions of errors in customs procedures have escalated, with mistakes now carrying substantial financial liabilities and damaging reputational risks. Non-compliance can lead to costly fines, increased scrutiny from customs authorities, and potential disruptions to supply chains. As a result, businesses are prioritizing customs compliance more than ever before, recognizing that maintaining adherence to regulations is essential for sustaining their operations and preserving their market position. Implementing robust compliance programs and regular audits can help mitigate risks associated with non-compliance, ensuring that businesses remain vigilant in an increasingly regulated environment.


  2. Border Delays Impact Supply Chains

    The introduction of new border checks and paperwork requirements has exposed the vulnerabilities of “just-in-time” logistics, a system that many businesses relied upon for its efficiency. From perishable goods like food to critical machinery components, companies have experienced firsthand how border delays can disrupt the flow of goods. These delays not only impact inventory levels but can also lead to increased costs and customer dissatisfaction. As a response, businesses are reevaluating their supply chain strategies, exploring alternative logistics solutions, and building in additional buffer time to accommodate potential delays. This shift towards more resilient supply chains is essential for maintaining competitiveness in a changing trade environment.



Arne and Paul discuss Brexit (Video)



  1. Dual Regulation Requires Extra Effort

    For companies operating in both UK and EU markets, the challenge of dual regulation has become a significant concern. They must navigate the complexities of complying with two distinct sets of regulations, standards, and product markings, notably the UKCA (UK Conformity Assessed) and CE (Conformité Européenne) markings. This duality demands additional resources and expertise, as businesses must ensure that their products meet the requirements of both jurisdictions. The need for thorough understanding and compliance with these regulations has prompted many companies to seek specialized legal and regulatory advice to avoid pitfalls and ensure market access across both regions.


  2. VAT Rules Changed Dramatically

    The implications of post-Brexit VAT rules have significantly altered the landscape for businesses, particularly concerning distance selling, import VAT, and European Union B2C supplies. Companies are now faced with the necessity to rethink their tax strategies to accommodate these changes, which can be intricate and confusing. The adjustments to VAT regulations require businesses to closely monitor their transactions and potentially adjust their pricing strategies to maintain competitiveness while ensuring compliance. Failure to understand and implement the new VAT rules can lead to unexpected tax liabilities and complications with revenue authorities, making it imperative for businesses to stay informed and proactive in their tax planning.


  3. The Importance of Customs Expertise

    As the landscape of international trade continues to evolve, businesses have come to recognize the critical need for customs expertise, whether through in-house knowledge or reliable external consultants. The complexity and frequency of regulatory changes necessitate a proactive approach to customs compliance, making it essential for companies to have access to up-to-date information and expert guidance. By investing in customs training for their staff or partnering with experienced consultants, businesses can better navigate the ongoing changes and complexities of customs regulations, ensuring they remain compliant and competitive in the global marketplace.


  4. Trade Agreements Are Not Automatic Benefits

    While having a Free Trade Agreement in place may seem advantageous, it does not guarantee immediate benefits for businesses. Companies must take the initiative to fully understand the provisions of these agreements and apply them correctly to reap the rewards. This involves a thorough analysis of the terms and conditions, as well as an understanding of how to leverage the agreement in practice. Without this knowledge and proactive engagement, businesses risk missing out on potential cost savings and market opportunities that the agreement could provide. Therefore, it is essential for companies to invest time and resources into understanding the intricacies of trade agreements to ensure they can maximize their benefits.


Arne’s Takeaway

Nine years after the vote, Brexit isn’t over. It’s simply shifted into a new gear. The EU and UK are carefully re-engaging—but success will depend on how ready you are. Brexit taught us that only the well-prepared can trade without tears. Learn the systems. Know the rules. Build your safety nets.


Expert Recommendations

  • Audit your declarations weekly to catch errors before they cause disruption.

  • Train your logistics partners on GVMS, Portbase, and other critical systems.

  • Leverage transit, but only if you understand every step.

  • Create a Brexit Border Crisis Plan—with contacts, protocols, and forms.

  • Subscribe to Customs Watch EU & UK to stay ahead of developments.


Sources & Further Information

Disclaimer

This blog is for educational purposes only and does not constitute legal advice. Always consult with qualified Customs professionals, Export Compliance advisors, or legal counsel to navigate Brexit complexities.


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