How TPD Rules Affect Vape Devices And E Liquids
How TPD Rules
Affect Vape Devices
& E-Liquids
The Tobacco and Related Products Regulations 2016 sit behind every vape device plus every bottle of e-liquid sold in the UK. Tank limits, nicotine caps, ingredient bans plus labelling rules all trace back to TPD. Here is what each rule covers.
The UK TPD sets hard limits on every device plus every e-liquid sold on the UK market. Devices are capped at 2ml tank or pod size. E-liquids are capped at 20mg/ml nicotine strength plus 10ml maximum bottle size for any nicotine-containing pre-mix. Every SKU must be notified to the MHRA at least six months before sale. Packaging must carry a nicotine health warning on 30% of front plus back. Certain ingredients including colourants, caffeine and taurine are banned. Non-compliant products cannot legally be sold in the UK.
Three numbers every UK
vape product must meet
TPD compliance starts with three hard numerical ceilings. Every device plus every bottle on the UK market has been engineered around these three figures.
Max tank or pod size
The legal maximum capacity of any single pod or refillable tank. Larger capacities cannot be sold to UK consumers.
Max nicotine strength
The ceiling for nicotine concentration. US-style 50mg/ml products are non-compliant in the UK.
Max e-liquid bottle
The largest bottle size permitted for any pre-mixed nicotine-containing e-liquid. Shortfills and longfills work around this.
TPD rules fall into four groups. Every UK vape product has to pass all four.
The Tobacco and Related Products Regulations 2016 is a piece of UK law originally transposed from the EU Tobacco Products Directive and retained in UK law after Brexit. Inside it sit the most important consumer-facing rules on vape products. The regulation is long but the vape-relevant parts fall into four clear groups.
Group 1: device hardware rules
The hardware rules constrain what a UK vape device can physically do. A device that meets UK TPD must:
- Have a tank or pod no larger than 2ml. This applies to every pre-filled pod, refillable tank plus disposable. The rule is absolute.
- Deliver nicotine at a consistent dose during normal use. This is tested under standardised MHRA emissions protocols.
- Be leak-proof during filling, refilling and transport. Sample units are tested against a specific protocol before notification.
- Be refillable without spillage. Pod designs that splash nicotine on to the user are non-compliant.
- Be child-resistant plus tamper-evident at the packaging level. Twist-to-open closures or foil seals are typical.
Group 2: e-liquid content rules
E-liquid rules govern what can and cannot be in the bottle. A compliant UK e-liquid must:
- Contain no more than 20mg/ml of nicotine. This is the strength ceiling. It applies to salts plus freebase liquids equally.
- Use only pharmaceutical grade nicotine of defined purity. Industrial or unrefined nicotine is banned.
- Exclude prohibited additives. Colourants, caffeine, taurine plus a list of other stimulants and CMR substances are specifically banned.
- Disclose every ingredient to the MHRA with supporting toxicological information.
- Not make any health or lifestyle claims beyond what is permitted on notified smoking cessation products.
Group 3: labelling and packaging rules
How a product is packaged is as regulated as what is in it. UK TPD labelling must include:
- The standard nicotine health warning on at least 30% of both the front and back of the retail pack.
- A full ingredient list on the outer packaging or included leaflet.
- Nicotine strength in mg/ml clearly displayed.
- Batch number plus expiry date for traceability.
- Company name plus UK address of the producer or importer.
- An information leaflet with usage instructions, warnings and contact details.
Group 4: notification process
A product that meets all of the above rules still cannot be sold until it has been notified to the MHRA. The process is straightforward but time-consuming:
- Submit a product specification including ingredient list, emissions data plus device technical specifications.
- Pay the notification fee. As of April 2026 this is £150 per new SKU plus £60 for a substantial amendment.
- Wait at least six months from notification to permitted first sale. The MHRA uses this window to review submissions.
- Retain annual records of production volumes, sales data plus any adverse event reports.
- Resubmit on material change. A new flavour or strength is a new SKU requiring its own notification.
Four ways TPD rules shape
the products on UK shelves
Why pods are 2ml
Every UK pod kit has a 2ml reservoir because anything larger is not allowed. The constraint drives mesh coil plus flavour efficiency innovation.
Why shortfills exist
The 10ml nicotine bottle cap led to the shortfill format: a 100ml nicotine-free base users mix with a nic shot themselves.
Why no caffeine vapes
Stimulants like caffeine or taurine are banned additives under TPD. Any brand advertising an energy vape for UK sale is non-compliant.
Why warnings cover 30%
The nicotine health warning must occupy at least 30% of the front and back of every retail pack. A fixed graphic specification applies across brands.
TPD compliant product vs
non-compliant product
How a Trading Standards officer or MHRA inspector actually assesses a product when it lands in front of them. The checklist is short but unforgiving.
Legal on the UK market
- ✓2ml tank or pod and 20mg/ml nicotine maximum.
- ✓MHRA notification number present on database for the exact SKU.
- ✓Health warning at 30% front plus back of retail pack.
- ✓Ingredient list plus batch code plus expiry date visible.
- ✓Child-resistant packaging plus tamper-evident seal in place.
- ✓UK producer or importer address printed on the pack.
Illegal on the UK market
- ✗Tank larger than 2ml or e-liquid stronger than 20mg/ml nicotine.
- ✗No MHRA notification on record for the exact SKU variant.
- ✗Missing or undersized health warning on the retail pack.
- ✗Banned ingredients such as caffeine, taurine or colourants present.
- ✗No child-resistant closure or tamper-evident seal on the bottle.
- ✗Overseas-only labelling with no UK importer address.
TPD is the foundation of every other UK vape rule. For the full set of FAQs covering notification, labelling, age verification plus the 2026 vape tax visit our complete vaping FAQs hub. Every major question an adult vaper or retailer asks about UK regulation sits in there.
Back to the Vaping FAQs hub
This article sits inside our complete FAQs knowledge base. Head back to the hub for the full index covering MHRA rules, TPD, the 2025 disposable ban, the 2026 vape tax plus retailer compliance.
More on UK vape TPD & MHRA compliance
TPD sits alongside MHRA notification plus UK-specific labelling. Our step by step walkthrough of how vape products are notified to the MHRA breaks the submission process into each field producers complete. The packaging side of TPD is unpacked in our guide to what labelling and packaging rules apply to vapes. For a broader read on how these constraints shape what the UK market develops our deep dive on how regulation affects innovation in the vape industry pulls the picture together.