September 30th, 2021 is the deadline to file UK national trademark applications claiming the earlier filing date of a European Union trademark application.
If you own a European Union trademark application which was applied for before 1st January 2021, but was not registered on 1st January 2021 (for example due to pending examination, appeal or opposition procedures) you must file a new trade mark application directly at the United Kingdom national authorities before 30th September 2021 in order to keep your trademark rights valid for Great Britain.
If you do not follow this term by filing a national trademark application the trademark rights from your EU trademark will cease to exist for Great Britain.
Analogues rules apply for EU designs and design applications.
For more and detailed information please click here.