UK-registered vehicles will need a GB sticker when driving in Republic Of Ireland after Brexit
The new UK government advice applies to all vehicle owners in Northern Ireland.
The UK's government citizen advice page has been updated with the impending arrival of Brexit, and under travel, it states "There may be changes after Brexit. What these are depend on how you're travelling."
On top of an International Driving Permit (IDP) and a 'green card' (which you'll get from your insurance company), all UK-registered vehicles will need a 'GB sticker'.
The white oval sticker containing the letters GB, standing for Great Britain, must be displayed at the rear of the vehicle.
However, Northern Ireland is part of the United Kingdom, but is not a part of Great Britain, which consists of England, Scotland, and Wales.
There has already been a strong reaction to this news, with Sinn Féin MP Paul Maskey stating on Twitter that he will not be putting the sticker on his car:
— Paul Maskey (@PaulMaskeyMP) September 2, 2019