Up to the point where the UK left the EU, the UK was an integral part of the EU food law system. Although the majority of existing EU food law initially continued to apply even after the end of transition, even if our standards remained the same, changes needed to be made to labels and other documentation to reflect thr UK’s new non-EU member status.
These changes were 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 were given more time to adjust.
There are also changes to existing Geographical Indication (GI) labels and to Organic certification schemes.