UKCA

The UKCA marking was created after Brexit and is therefore a replacement for the CE marking. Instead of the EU guideline and regulations, the corresponding UK laws have had to be complied with since the beginning of last year, which require UKCA labelling. 
The labelling has been mandatory since 01.01.2021. However, there is a so-called transition phase from 01.01.2021-31.12.2022. During this period, manufacturers are still permitted to introduce products with only CE labelling to the UK market. From 1 January 2023, the UKCA mark must be affixed to the product, with a similar requirement to the CE mark, for example:

• The UKCA mark must be clearly visible and legible on the product
• UKCA markings may only be affixed to a product by manufacturers or authorised representatives where this is permitted by the relevant legislation.

Products that are prescribed for UKCA labelling are, for example

• toys
• lifts
• industrial machinery

Further official information from the UK government can be found  here.