“British exports now face full EU customs and sanitary checks that increase costs and delays, making low-margin products unprofitable.”
Well, yes.
The UK left the EU and is subject to ‘Third Nation’ regulations when trading with the EU.
This was always going to be the case, it was clearly stated by the EU and it was repeatedly stated by the Remain Campaign, you’ll find it filed under ‘Project Fear’.
The Leave Campaign made baseless claims that post Brexit the UK could have favorable trade with the EU, you’ll find those filed under ‘Project Unicorn’, sub-folder ‘Cake’.
https://www.politico.eu/article/15-things-uk-vote-leave-promised-on-brexit-and-what-it-got/