Manufacturers will therefore continue to be permitted to place products bearing only the CE marking on the UK market beyond December 31, 2024. The CE marking, the EU declaration of conformity and the EU type examination will be treated as alternatives to the corresponding UK elements even after the end of 2024.
The UKCA label may still be attached to the product "provisionally". This is possible, for example, via the corresponding marking in the operating instructions, an additional label or similar. If the UKCA mark is permanently affixed to the product itself, the requirements are comparable to those for the CE mark.
You can find more information here.