The UKCA marking is the UK alternative for the European CE label for many products, including most electrical and electronic equipment under the Europe RoHS and ecodesign ErP directives.
UKCA Replacing CE Marking in the UK?
On February 2nd, 2019, the Department for Business, Energy & Industrial Strategy of the government of the UK drafted guidance in this regard which was updated on September 1st, 2020. Here is a simplified summary of what we have learned from the official publications and what it entails in terms of RoHS compliance.