At the time that Boris Johnson was talking up post BREXIT Global Britain and assuring the Democratic Unionist Party that there would be no border in the Irish Sea (despite one being included in his “oven ready agreement” which Teresa May had said no British Prime Minister could sign) the Government was requesting that the stickers on cars travelling abroad be changed from GB to UK.
The move was only revealed by the United Nations which said it had received “a notification stating that the United Kingdom is changing the distinguishing sign that it had previously selected for display in international traffic on vehicles registered in the United Kingdom, from ‘GB’ to ‘UK'”.
The rules changed in September 2021 and yet it has not proved possible to find any reference to a debate in, or approval by, Parliament on such a potentially significant change in identity.
The Department for Transport said that it was part of a wider move across Government. One reason was GB – Great Britain – only formally included England, Wales and Scotland, whereas the United Kingdom of Great Britain and Northern Ireland (UK) is inclusive of Northern Ireland as well as England, Scotland and Wales, it said.
It is true that Great Britain is the official collective name of England, Scotland and Wales and their associated islands and does not include Northern Ireland.