One basic but key question is what address(es) to put on the label of a food product. Currently, in order to legally sell pre-packaged products in the EU, you must place the name and address of a "food business operator" on the label. This is the operator under whose name or business name the food is marketed or, if that operator is not established in the EU, the importer into the EU.
At the moment, this requirement can easily be met by using a UK address. In order to export food to the EU following a no deal Brexit, UK businesses will still have to comply with this mandatory requirement of EU law. It will no longer be enough to include only a UK name and address on the label.
Melanie Martin and Michael Dean