From The Guardian

Brexit: food and drink exports to EU suffer ‘disastrous’ decline

"Exporters have struggled with the extra paperwork and administrative costs that came into force on 1 January 2021, with companies required to document their products for trading standards, customs and health reasons before entry to the EU.

Food exporters are particularly exposed because of the physical sanitary and phytosanitary (SPS) checks that were not necessary before Brexit, with lorries facing partial or full unloads in Calais and other ports if any of the paperwork is missing."

And

"FDF said imports of food and drink and ingredients could “deteriorate” further in 2022 when full SPS checks on imports are introduced for the first time at Dover and other ports.

While the EU imposed the full suite of documentary, customs and SPS Brexit checks from 1 January, the UK decided to phase them in: new tax checks will be introduced on 1 October and food health checks are scheduled to begin on 1 January."