I purchased some 'cloned' sat-nav chargers from the same supplier, which some had markings others did not. One fell to bits on removal from a 240v power socket, so I took it up with the seller. They were totally unaware of the legal requirements,so I took up the issues with the local Trading Standards.
The local Trading Standards contacted the Trading Standards in the sellers district, and an 'advisory visit' was made.
All electrical products in the UK 'must' have regulation markings (but this doesn't necessarily confirm the item as been tested and approved, and the item might be dodgy).