Trademarks and Brexit: The Gift That Has Stopped Giving

Stites & Harbison Client Alert, December 19, 2025

The United Kingdom Intellectual Property Office now requires UK-specific proof of trademark use and reputation.

Owners of UK trademarks will recall that one result of Brexit was the automatic creation of UK trademark registrations “cloned” from EU trademark registrations in 2021.

This December 31 closes the five-year period during which proof of trademark use and reputation in the EU also satisfied the UK requirements.

Beginning January 1, 2026, use of a mark that was cloned in the UK must be specific to the UK, and the UKIPO will disregard EU trademark use prior to 2021.

A savvy UK trademark owner will use the mark in the UK and preserve post-Brexit proof of use in the UK, in case the cloned registration is challenged in an invalidity action or opposition.

The UKIPO provides guidance here.

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