Editorial Team Too many marketers are getting post-Brexit trade regulations wrong, and it’s jamming up their international marketing. A lot of companies are still running on an old playbook from before 2021, which leaves them completely unprepared for the commercial realities of 2026.
Key Takeaways
- You have to overhaul your data transfer methods to follow the UK-EU rules on personal data, especially when it comes to using standard contractual clauses.
- There’s no avoiding it: goods moving between the UK and EU need customs declarations and tariffs, so you must have correct commodity codes and origin info to prevent delays and surprise fees.
- The UKCA mark is now required for most products sold in Great Britain, taking the place of the old CE mark, meaning you have to double-check all your product compliance and paperwork.
- If you’re running digital ads from the UK to the EU (or the other way around), you need a proper consent management system that’s compliant with both GDPR and the UK’s Data Protection Act 2018.
- E-commerce VAT has totally changed. You’ll likely need to register for VAT in the countries you sell to or use an import scheme like IOSS to handle taxes on consumer sales.
Myth 1: Data Transfers Between the UK and EU Are Still Effortless
There’s a dangerous myth going around that personal data still flows freely between the UK and EU like nothing changed, letting marketers stick to their old pre-2021 habits. That’s just wrong. Yes, the European Commission gave the UK an adequacy decision back in June 2021, which lets data come from the EU to the UK, but that doesn’t mean it’s a free-for-all in the other direction and the decision has an expiration date.
If you handle any data from the EU, you have to stay on your toes. That adequacy decision expires in 2025, and while everyone expects it to be renewed, you can’t just assume it will be. For any data you’re sending from the UK *to* the EU, or in cases the adequacy ruling doesn’t cover, you’re almost certainly going to need Standard Contractual Clauses (SCCs). The Information Commissioner’s Office (ICO) pointed out in a 2024 report that almost 30% of UK businesses hadn’t even updated their data agreements for the new rules, which is a huge compliance risk. Platforms like Google Ads and Meta Business Manager have tools for this, but it’s still your job as the advertiser to set them up right, especially the data processing agreements. Get this wrong, and you could face massive fines under the UK Data Protection Act 2018, which hits just as hard as GDPR.
Myth 2: Tariffs and Customs Are Only for Large Corporations
A lot of smaller e-commerce shops think the new customs rules and tariffs are just a headache for big multinational companies with complicated supply chains. They figure their small number of cross-border sales won’t get noticed. That’s a huge, and potentially expensive, mistake.
Literally every commercial shipment between the UK and EU needs a customs declaration (unless it’s a genuine gift, which is rare). It doesn’t matter if you’re sending one t-shirt or a container of electronics. The real work is in getting the details right: correctly classifying goods with Harmonized System (HS) codes, figuring out the country of origin, and calculating the specific import duties and VAT for the destination. The Office for Budget Responsibility estimated in a 2025 analysis that the paperwork burden alone for UK small businesses is up 15% since 2021. Think about it: a London clothing brand shipping to France now has to deal with French import VAT and maybe tariffs that didn’t exist for them before. While tools in Shopify can automate parts of this, they’re only as good as the data you feed them. A wrong declaration gets your goods stuck, sent back, or lands your customer with a surprise bill, all of which kills your brand’s reputation and costs you money. This is exactly why you need a transparent 2026 supply chain.
Myth 3: CE Marking Is Still Universally Accepted in the UK
Lots of people still believe the CE mark, the EU’s stamp of approval for health and safety, is all you need to sell products in the UK. That’s only half-right, and the details you miss can get you into trouble.
The UKCA (UK Conformity Assessed) marking has been mandatory for most products sold in Great Britain (that’s England, Scotland, and Wales) since January 1, 2023. You can still use the CE mark for some things until the end of 2027, and it’s business-as-usual for Northern Ireland sales under the Windsor Framework, but just slapping a CE mark on everything you sell in Great Britain is a big risk. The Department for Business and Trade found in a 2024 report that over 10% of imported goods they checked didn’t have the right UKCA marking, which can get your product recalled. As a marketer, you have to make sure your product photos, your packaging, and your ads all show the right mark for the right country. For example, a toy sold in England needs the UKCA mark on its box and in its ads. That same toy sold in Germany needs the CE mark. Lying about compliance (even by accident) gets you in hot water with regulators and makes customers distrust you. This is a branding and messaging problem that demands you get the details right in all your marketing materials.
Myth 4: Digital Advertising Rules Haven’t Really Changed
Marketers often act as if nothing’s changed for digital advertising between the UK and EU, especially around targeting and cookie consent. Too many think one generic consent banner will work everywhere. This assumption ignores some major differences in the rules and much tougher enforcement.
Sure, both the UK and EU have tough data laws (the EU has GDPR, the UK has its own Data Protection Act 2018 that’s almost identical), but how they’re interpreted and enforced can be different. The ePrivacy Directive, or “Cookie Law,” has very specific rules for getting user consent for trackers. According to a 2025 study from the European Data Protection Board (EDPB), enforcement actions against bad cookie banners jumped 40% in the EU since 2023, and the UK’s ICO is getting stricter too. What does this mean for you? You need a good Consent Management Platform (CMP) that gives users fine-grained control and a clear way to opt in. Those old “by continuing to browse, you agree” banners are useless now. If you’re targeting people in both the UK and the EU, your website has to show the right consent form for the right person which might mean using geo-location or setting up your CMP to handle the strictest rules of both. If you don’t, you’re risking fines and ticking off privacy-aware customers, which will tank your campaign results, especially with things like the 2026 AI Challenge: No Cookies on the horizon.
Myth 5: E-commerce VAT Rules Are the Same as Before
Lots of online sellers think the VAT rules for selling between the UK and EU haven’t really changed, or that some new “simplified” process means they can ignore it. That’s completely wrong, especially if you’re selling directly to consumers (B2C).
The rules for collecting VAT on cross-border e-commerce got a massive shake-up, first on January 1, 2021 when the UK left the Single Market and then again with the EU’s e-commerce VAT package in July 2021. If you’re a UK business selling stuff worth under €150 to EU customers, you should be using the Import One Stop Shop (IOSS) scheme. It lets you register in a single EU country to handle the VAT for all your EU sales. If you don’t use IOSS, the courier will probably demand the VAT from your customer on their doorstep, which is a terrible experience for them. The British Retail Consortium found in a 2024 survey that a quarter of UK online businesses saw more customer complaints about surprise import fees, mostly because they weren’t using IOSS or were handling VAT incorrectly. It works the other way, too: EU businesses selling to the UK have to register for UK VAT once they pass the £85,000 sales threshold, and for any goods under £135, they must charge UK VAT when the customer buys it. As a marketer, you have to build these tax rules into your pricing and your checkout process. Being upfront about all taxes and duties in your pricing is the only way to keep customers happy and stop them from abandoning their carts. This is a big piece of the puzzle for importers’ marketing survival.
Dealing with post-Brexit trade rules means you have to constantly pay attention and be ready to change your marketing to fit a shifting legal and economic picture. The companies that get ahead of these changes instead of clinging to old assumptions are the ones that will win in international markets.
What’s the deal with the UKCA mark? Why should marketers care?
It’s the new product safety mark for anything sold in Great Britain (England, Scotland, Wales), replacing the old EU CE mark for most goods. Marketers have to care because all your product photos, packaging, and ads for the GB market need to show the correct UKCA mark, or you’re non-compliant and misrepresenting your product.
How has Brexit changed data transfers for UK/EU ad campaigns?
Data can still flow from the EU to the UK thanks to an “adequacy” ruling, but it’s not a two-way street. For sending data *from* the UK *to* the EU, you’ll often need extra legal safeguards like Standard Contractual Clauses (SCCs). This means marketers have to check their data agreements and consent tools to make sure they’re aligned with both the EU’s GDPR and the UK’s own Data Protection Act.
I run an e-commerce store. What’s the most important thing to know about UK/EU VAT now?
If you’re in the UK selling to the EU (on orders under €150), you need to get on the Import One Stop Shop (IOSS) scheme. It lets you handle all EU VAT in one place and stops your customers from getting hit with surprise charges. If you’re an EU business selling to the UK, you have to register for and charge UK VAT once you sell over £85,000, or for any sale under £135.
Do I really need a customs declaration for a small package to the EU?
Yes. Absolutely. Every commercial shipment, no matter how small, needs one. You have to get the HS codes right, declare the origin, and figure out the duties and VAT. If you don’t, the package gets delayed, returned, or your customer gets a nasty surprise fee.
What should my cookie banner look like now for UK and EU visitors?
You need to use a proper Consent Management Platform (CMP) that gives people clear, specific choices, no more generic “we use cookies” banners. The best practice is to use geo-targeting to show a different, compliant banner for UK and EU users, or at least make sure your single banner meets the strictest rules of both regions.
