TPO Ban in Great Britain: What Nail Technicians Actually Need to Know in 2026
Quick Summary
TPO is being prohibited as an ingredient in cosmetic products in Great Britain. Gel nail services themselves are not banned. TPO (Trimethylbenzoyl Diphenylphosphine Oxide) is a photoinitiator used in some UV/LED-curable nail products, and its use as a cosmetic ingredient is being phased out under two dates: 15 August 2026 for placing products on the market, and 14 February 2027 for making them available through ordinary supply.
Current guidance from the Cosmetic, Toiletry & Perfumery Association (CTPA), developed following discussion with Trading Standards, is that professionals may continue using TPO-containing products they already possess after the making-available deadline, although they cannot obtain further stock through the supply chain after that point. This is a professional interpretation of the regulation, not a separate law of its own, and Great Britain's approach is materially different from the EU's.
What Is TPO?
TPO stands for Trimethylbenzoyl Diphenylphosphine Oxide. It is a photoinitiator, an ingredient used in some UV/LED-curable nail products to help them react and harden when exposed to light from a nail lamp. It has appeared in some formulations of gel polish, builder gel systems such as BIAB, base coats and other UV or LED-cured nail cosmetics — though not every product, and not every brand's product, necessarily contains it.
TPO was given a Category 1B reproductive toxicant classification under Commission Delegated Regulation (EU) 2024/197. Under both EU and Great Britain cosmetics law, a harmonised CMR (carcinogenic, mutagenic or reprotoxic) classification automatically triggers restrictions on that substance's use in cosmetic products. That classification is the regulatory trigger behind everything described in this article — it does not, on its own, tell you what happens to a finished, cured manicure, which is addressed later in this article and in our companion piece on what the fertility headlines actually mean.
Say it plainly
TPO is being prohibited as an ingredient in cosmetic products in Great Britain. Gel nail services themselves are not banned.
The Two Great Britain Dates, Explained
Great Britain's transition is built around two separate deadlines. They apply to different points in the supply chain, and confusing them is where most of the misunderstanding among technicians starts.
15 August 2026 — Placing on the Market
From this date, affected TPO-containing cosmetic products can no longer be newly placed on the Great Britain market. In practice, this deadline sits with manufacturers and importers: it stops new production of affected formulations entering the GB market from this point onward.
14 February 2027 — Making Available / Off-Shelf
Products that were legally placed on the market before 15 August 2026 can continue moving through the supply chain — wholesaler to distributor to salon — until 14 February 2027. After this date, suppliers and distributors can no longer make affected products available for sale.
What about products a technician already owns?
Current CTPA guidance, developed following discussion with Trading Standards, is that professional users may continue using TPO-containing products they already possess after the 14 February 2027 making-available deadline, although they cannot obtain further stock of affected products through the supply chain after that point. CTPA describes this as its interpretation of the regulation for professional use, reached in discussion with Trading Standards — it is current professional guidance, not a court ruling, and technicians should treat it accordingly and watch for any formal updates.
Great Britain Is Not the Same as the EU
A great deal of confusion circulating among technicians comes from applying EU information to a Great Britain business, or the reverse. The two frameworks reached different conclusions about existing stock, and the difference matters in practice.
In the EU, the prohibition on TPO in cosmetic products applied from 1 September 2025, and it covered professional use of previously purchased stock. The European Commission's own guidance is explicit that the EU Cosmetics Regulation contains no "sell-through" or "use-up" provision for this substance — meaning EU-based professionals could not continue using TPO-containing products on clients after that date, regardless of when the product was bought.
Great Britain's implementation, by contrast, separates the placing-on-the-market date from the making-available date, and current CTPA guidance permits continued professional use of existing stock after the making-available deadline, even though further purchasing is not permitted. Do not assume information written about the EU rule automatically applies to a Great Britain salon, and do not assume the reverse either.
Northern Ireland
Northern Ireland should be treated separately from the rest of Great Britain. Under the post-Brexit Windsor Framework, Northern Ireland continues to follow the EU Cosmetics Regulation rather than the Great Britain statutory instruments that set the 15 August 2026 and 14 February 2027 dates. A salon operating in Northern Ireland should not assume the GB dates or the GB professional-use interpretation apply to it.
What Nail Technicians Should Do Now
The transition period gives technicians time to act deliberately rather than react. A sensible approach covers the following:
- Identify which of your products contain TPO. Not every gel system, and not every product from a given brand, necessarily contains it.
- Check the official INCI ingredient list. The ingredient will appear listed as Trimethylbenzoyl Diphenylphosphine Oxide.
- Obtain current information from manufacturers and authorised suppliers. Brands are best placed to confirm whether a specific product is affected and whether a reformulated version exists.
- Identify reformulated, TPO-free versions where they exist. See our companion article on what to check before changing gel systems before assuming a reformulated product behaves identically to the one it replaces.
- Keep supplier and purchase information. Records of when and from whom affected stock was obtained may be useful if questions arise later.
- Understand the two GB transition dates and what each one does and does not require of you.
- Do not assume information circulating about the EU rule automatically applies in Great Britain. The two frameworks differ on existing stock, as explained above.
- Plan future purchasing around compliant formulations so that your ordering naturally shifts ahead of the making-available deadline rather than at the last moment.
Key Takeaways
- Gel nail services are not banned in Great Britain — TPO, one ingredient used in some formulations, is being phased out.
- 15 August 2026 stops new products being placed on the GB market; 14 February 2027 stops affected products being made available for sale.
- Current CTPA guidance allows continued professional use of existing stock after 14 February 2027, but not further purchasing — this differs from the EU, which allowed no continued professional use after 1 September 2025.
Related Articles
Frequently Asked Questions
Are gel nails banned?
No. The regulatory change concerns TPO, an ingredient used in some UV/LED-curable nail products, not the gel manicure or gel nail service as a whole. Salons can continue offering gel services using compliant formulations.
Can I still perform gel manicures?
Yes. Nothing in the TPO rules prohibits gel manicures as a service. The change affects which formulations can be placed on and made available in the Great Britain market from the two dates set out above.
Can I buy TPO-containing products now?
Affected products can still be placed on the market until 15 August 2026 and made available through the supply chain until 14 February 2027. After 14 February 2027, current CTPA guidance is that distributors can no longer make affected products available, so professionals will not be able to purchase further stock.
What happens to stock I already own?
Current CTPA guidance, reached in discussion with Trading Standards, is that professionals may continue using TPO-containing products they already possess after the making-available deadline, but cannot obtain further stock of affected products after that point. This is professional guidance rather than a separate piece of legislation, so it is worth watching for any formal updates.
Is 15 August 2026 the date technicians must throw products away?
No. 15 August 2026 is the deadline for newly placing affected products on the GB market — it is primarily a manufacturer and importer deadline. It does not, on its own, require a technician to dispose of stock already purchased.
What changes on 14 February 2027?
From this date, suppliers and distributors can no longer make affected TPO-containing products available on the Great Britain market. Under current CTPA guidance, professionals can continue using stock they already hold after this date, but cannot buy further affected stock.
Does the rule affect BIAB, builder gel, gel polish and hard gel?
Whether a specific product is affected depends on its formulation and ingredient list, not on the product category name. TPO has appeared in some gel polish, builder gel and other UV/LED-cured formulations, but not every product described this way contains it — check the INCI ingredient list or ask the manufacturer.
How do I identify TPO on an ingredient list?
Look for the INCI name Trimethylbenzoyl Diphenylphosphine Oxide on the product's ingredient list or packaging. If it is not listed, the product is not TPO-containing on the basis of that label.
Are Northern Ireland and Great Britain following exactly the same rules?
No. Northern Ireland continues to follow the EU Cosmetics Regulation under the Windsor Framework, rather than the Great Britain statutory instruments that set the 15 August 2026 and 14 February 2027 dates. Businesses should not assume the two frameworks are identical.
Professional Note
This article summarises publicly available regulatory information and current CTPA guidance for general educational purposes. It is not legal advice. Regulatory deadlines, interpretations and Trading Standards positions can be updated; nail technicians and salon owners should confirm current requirements directly with CTPA, Trading Standards, their product suppliers or a qualified adviser before making compliance decisions.
Sources: CTPA, GB Interpretation of 'Making Available' Dates for Banned Ingredients — Professional Use; European Commission, TPO in Nail Products — Questions & Answers. This article reflects publicly available regulatory information current at the time of writing. TheNailWiki is an independent educational resource and maintains editorial independence from all commercial interests.