distinguishing signs of vehicles for international traffic

From tomorrow on (28 September, 2021) and with no official reason cited though one suspects it is in show of support for Northern Ireland, the United Kingdom is switching its national identifier decal for cars and lorries from GB (Great Britain, the nations nominally to the exclusion of NI) to UK. License plates which also currently bear the GB identifier and the circle of stars on a blue field representing the European Union will also require a change, to UK above a Union Flag. The new stickers, needed for travel outside the UK but not applicable to Gibraltar or other overseas territories, will be available for £1.50.