Previously the UK authorities indicated the leave from the European Union would have an immediate impact on food labels in case no deal would be negotiated. In the no-deal scenario, prepacked food products would have to include a responsible operator (i.e. manufacturer, importer or distributor) established within the UK from 29 March 2019. However, in order to provide some leeway to businesses and secure food availability in Britain, the UK authorities opened a consultation to get feedback on the installation of a transition period. The deadline for the consultation is set on 4 December.
UK Department for Environment, Food and Rural Affairs - Food labelling: amending laws - link