Up to now, the UK has been an integral part of the EU food law system. Although the majority of existing EU food law will initially continue to apply even after the end of transition, even if our standards remain the same, changes will need to be made to labels and other documentation to reflect our new non-EU member status.
These changes will need to be immediate in respect of products intended for export to the EU (and almost certainly for most other destinations). But goods made and marketed in the UK will be given more time to adjust.
There will also be changes to existing Geographical Indication (GI) labels and to Organic certification schemes.