How to check if a name is trademarked in the UK

Step 1: search the UK register

The UK IPO's free trade mark search lets you look up words, numbers and owners. Search your exact name, then variations: plurals, misspellings, the name split into two words, and anything that sounds the same.

UK registrations include comparable marks created from EU trade marks that were registered before 1 January 2021, so older EU brands can show up on the UK register too.

Step 2: focus on the right classes

Trade marks are registered for specific goods and services, grouped into 45 classes under the Nice classification. A mark for clothing (class 25) doesn't usually stop the same word being used for software (class 9), unless the earlier mark is well known. Look up the classes for what you sell and check those, plus closely related ones.

Step 3: think like the tribunal

• Similar, not just identical: one letter apart, or the same sound, can be enough.
• The dominant part counts: an extra word like 'studio' or 'co' rarely makes a mark different enough.
• Related goods count: candles and soaps, or apparel and accessories, are often treated as similar.
• Status matters: a pending application can still block you once it's registered.

Step 4: check for unregistered use

A business that's been trading under a name can stop you using it through passing off, even without a registration. Search the web, social platforms, marketplaces and Companies House. Note that a company name being available at Companies House doesn't mean you can use it as a brand.

Step 5: check your listings, not just your name

Sellers often get into trouble not with their own name but with other brands in their titles and tags: 'style', 'dupe' or 'inspired by' next to a well-known name is still trade mark use. Check each listing before you publish it.

Mistakes to avoid

• Only searching the exact spelling: sound-alikes and one-letter changes are where most conflicts hide.
• Ignoring related classes: a clash in a neighbouring class can still lead to an opposition.
• Assuming a domain or social handle means the name is free to use as a brand.
• Launching first and registering later: someone can file in the meantime, and the earlier filing date wins.
• Forgetting product lines: a distinctive product name may need its own search and registration.

How Infringement Ninja helps

Paste a listing or a link into Infringement Ninja's listing check and you'll see which words or images could get it removed, who likely owns them, and a safer title and tags. Once you've chosen a name, a watch alerts you if someone files something similar.