A trading standards officer walks into a vape shop in Birmingham. She’s not there to browse. She’s there because someone flagged a product on the shelf — a 30ml bottle of nicotine e-liquid with no batch code, no UK responsible person listed, and a label claiming 20mg/ml that doesn’t match the declared fill volume. The retailer had no idea. They’d ordered from a wholesale supplier they’d used for two years, assumed everything was fine, and stocked the shelves.
That scenario is playing out across the UK right now. MHRA enforcement around TPD (Tobacco Products Directive) compliance has tightened noticeably in 2026, and the pressure isn’t only on manufacturers. Retailers and online sellers are being held accountable for what they put in front of customers. If your wholesale e-liquid supplier is cutting corners — on labelling, documentation, tank declarations, or nicotine thresholds — you’re the one holding the bag when something gets flagged.
This guide covers the seven clearest warning signs that your wholesale e-liquid stock may not be TPD compliant under UK law. Some are obvious once you know what to look for. Others are the kind of detail that slips through precisely because they look fine at a glance.
1. The Nicotine Strength Exceeds 20mg/ml
This is the most fundamental limit in UK TPD regulation, and it’s still being breached in 2026 — usually by products crossing over from markets where higher strengths are legal.
Under UK TPD, e-liquids containing nicotine cannot exceed 20mg/ml (2%) in strength. Any bottle claiming 25mg, 30mg, 50mg, or higher isn’t legal to sell as a nicotine e-liquid in the UK. You’ll sometimes see these marketed as “salt nic” products with vague labelling that doesn’t clearly declare the actual nicotine concentration — which is itself a compliance failure, but the strength breach is the bigger issue.
If your wholesale supplier is offering anything above 20mg/ml as a ready-to-sell product, not a shortfill designed to be diluted, that stock shouldn’t be on your shelves. Request the lab certificates. A compliant supplier will have them.
2. The Bottle Volume Exceeds 10ml for Nicotine-Containing Liquid
UK TPD limits nicotine-containing e-liquid to containers no larger than 10ml. If you’re receiving 30ml, 50ml, or 100ml bottles that contain nicotine — not shortfill blanks, not zero-nic products, but actual nicotine e-liquid — those products are non-compliant.
Shortfills (bottles containing nicotine-free e-liquid with room for a nicotine shot) are legal and common. The issue arises when a 50ml bottle has nicotine already mixed in, or when the labelling is ambiguous about whether nicotine is present. Some suppliers, particularly those sourcing from non-UK markets, send stock where the nicotine is listed in fine print or in a language other than English, making the volume breach easy to miss on a quick check.
Worth noting: shortfill products should also have clear labelling indicating they contain zero nicotine in the bottle itself, even if a nicotine shot is intended to be added. If that’s not clearly stated, you’ve got a labelling compliance problem even if the formula is technically legal.
3. No UK Responsible Person Is Listed on the Packaging
This is one of the most frequently overlooked compliance requirements, and it’s a clean indicator of a supplier who isn’t doing things properly.
Every e-cigarette and e-liquid product sold in the UK must have a UK responsible person declared on the packaging. This is the entity — a company or individual — registered in the UK who takes legal responsibility for the product’s compliance with TRPR (Tobacco and Related Products Regulations 2016, which implements TPD in UK law). Post-Brexit, an EU-based responsible person isn’t sufficient for UK market products.
If your bottles only list a manufacturer based in China, the US, or an EU country with no UK entity named anywhere on the label, that’s a problem. Compliant packaging will typically show a UK company name and address, sometimes alongside a phrase like “UK Responsible Person” or similar. If you can’t find it, ask your supplier for documentation. If they can’t provide it, find a different supplier.
4. Missing or Incomplete Batch Codes and Lot Numbers
Batch traceability is a core part of UK TPD requirements, and it matters for a practical reason beyond compliance: if a product is ever subject to a recall, batch codes are how you identify which stock is affected and pull it from sale quickly.
Compliant e-liquid packaging must carry a batch or lot number that allows the product to be traced back through the supply chain. This is usually printed or embossed on the bottom of the bottle or on the outer box. But “present” and “compliant” aren’t the same thing — a batch code that’s been printed in a way that’s partially illegible, that uses a format inconsistent with the declared manufacturer, or that simply doesn’t correspond to any documentation your supplier can provide, is still a problem.
A simple audit of your current stock: pick up ten bottles from different lines, locate the batch code on each, then ask your supplier to cross-reference those codes against their compliance records. If they can’t, or won’t, that tells you something important about how they source.
5. The Health Warnings Don’t Meet UK Labelling Standards
UK TPD requires specific health warning text on e-liquid packaging. The exact requirement is that nicotine-containing products carry the warning: “This product contains nicotine which is a highly addictive substance.” This must appear on both the primary and secondary packaging in a clearly legible format, occupying at least 30% of the corresponding surface.
Products arriving from non-UK suppliers — particularly those originally manufactured for EU, US, or Asian markets — often carry different warning text, or carry warnings in a different language, or have the warning printed too small to meet the 30% surface requirement.
A separate issue: products that carry EU-market warnings (which differ from UK post-Brexit requirements) are technically non-compliant for UK retail even if the formula itself is fine. This is one of those details that tends to slip through because the packaging looks professional and the warning text is present in some form. Present isn’t the same as compliant.
6. No MHRA Notification Reference or Inability to Provide One
Before any nicotine-containing e-liquid product can be legally sold in the UK, it must be notified to the MHRA (Medicines and Healthcare products Regulatory Agency) via the EU Common Entry Gate (EU-CEG) system or the UK’s equivalent. The manufacturer or UK responsible person submits product details — ingredients, emissions, nicotine levels, delivery device compatibility — and receives a notification reference.
If your wholesale supplier cannot provide MHRA notification evidence for a specific product, that product likely hasn’t been properly registered. This is a significant compliance gap. It also means there’s no official record of what the product contains, which is a separate concern around consumer safety.
Requesting notification documentation is reasonable and legitimate. A wholesale supplier operating properly will have this on file and will be able to send it within a few working days. Delays, evasiveness, or claims that “the manufacturer handles all that” without supporting documentation should raise a flag. At Vapesguide, we work with suppliers who can provide compliance documentation on request — it’s a basic expectation for any wholesale relationship.
7. Child-Resistant and Tamper-Evident Packaging Is Absent or Defective
UK TPD requires that all nicotine-containing e-liquid containers be both child-resistant and tamper-evident. Child-resistant means the cap mechanism must conform to EN ISO 8317 standards — the standard squeeze-and-turn or press-and-turn mechanisms used across compliant products. Tamper-evident means there should be a visible seal or indicator that shows whether the product has been opened.
Products failing this requirement are visually easy to identify once you know what to look for. A simple screw cap with no resistance mechanism. A bottle with no seal band or shrink wrap on the cap. A “unicorn” dropper bottle with a nozzle that any child could operate without difficulty.
This one matters beyond compliance. Nicotine is acutely toxic in sufficient quantities — a 10ml bottle of 20mg/ml e-liquid contains 200mg of nicotine, which is a meaningful hazard for a small child who manages to open it. The packaging requirement exists for a reason, and products that bypass it shouldn’t be in your retail stock regardless of what other paperwork says.
What to Do If Your Stock Fails These Checks
Identifying non-compliant stock doesn’t automatically mean a penalty — but selling it does put you at risk. Under TRPR, enforcement can result in product seizure, improvement notices, and in serious cases, fines or prosecution. The MHRA has increased its proactive enforcement activity in 2026, particularly around online retailers.
The practical steps: pull suspect stock from sale immediately. Contact your supplier and request full compliance documentation for every product line you stock — MHRA notification references, lab certificates, UK responsible person details, and batch traceability records. If they can’t provide these, you have grounds to dispute the purchase and seek a refund or replacement with compliant alternatives.
For ongoing sourcing, build compliance documentation requests into your standard purchase order process. Ask before you order, not after the stock arrives. Suppliers who are genuinely compliant won’t find this unusual — they’ll have the paperwork ready.
And if you’re running an online store, the compliance responsibility extends to your product listings too. Nicotine content, volume, and health warnings should be accurately represented on your product pages, not just on the physical packaging. Trading standards can and do review online listings as part of enforcement activity.
Understanding what compliant packaging looks like is easier once you’ve spent time with products that meet the standard. If you want to see how compliant e-liquid stock is presented — from labelling to batch documentation — exploring Vapesguide’s e-liquid range gives you a working reference point. Every product stocked through legitimate wholesale channels should look and document itself in a similar way.
For context on how vaping products compare to traditional cigarettes — relevant both to customer conversations and compliance framing — the guide on how many cigarettes a disposable vape equals in the UK covers the nicotine equivalency question in detail. And if your customers are asking about product lifespan and consistency — questions that often come down to product quality and, indirectly, to whether the product was manufactured to a compliant standard — the piece on how long a disposable vape lasts is worth reading alongside this one.
The compliance landscape in 2026 rewards retailers who treat documentation as seriously as they treat price per unit. The ones who don’t are the ones getting visits from trading standards.
