The letters UKCA declaring conformity for the Great Britain market.
The UKCA mark declares conformity with Great Britain's product requirements. It was introduced after EU exit to do the job CE does in the EEA, and applies to Great Britain rather than the whole United Kingdom.
Affixed by the manufacturer to declare conformity with the requirements applying to goods placed on the Great Britain market.
Great Britain · Contexts: Packaging
Its territory is Great Britain rather than the United Kingdom: Northern Ireland continues to follow the EU regime, which is why some goods carry both marks.
Great Britain · Contexts: Packaging
The four capital letters U, K, C and A set as one group, the C and A overlapping so their strokes share an edge.
The two do the same job in different territories, and goods sold across both carry both.