Hi EQA
From the UK legislation, the Food Business Operator under who's name or business name the food is marketed is responsible for the food information. In this case the label, but applies to all the information.
If the food business is not established in the EU then it is the importer who is responsible.
A food operator who does not affect the food information, i.e. a retailer, packer or co manufacturer shall not supply food
"which they know or presume, on the basis of the information in their possession as professionals, to be non-compliant with the applicable food information law and requirements"
Under the UK legislation the owner of the brand is responsible for the accuracy of the information on the label.
But any one producing or even selling on behalf of another company has a responsibility to check that the information meets the legislation.
You do not have to produce the info, but should be checking.
regards