European rules and regs., rubber stamped by our puppet parliament, ensure that we are one big happy PZ. Thus 'trade' - as in movement of either vaccinated or unvaccinated stock may move freely within the border. That's border as in a European PZ border. Not the British Isles.
Although under present statute, a ban is not possible, other countries have made entry conditional on certain hoops being jumped through. And, if he was mindful, Benn could do exactly the same. One must assume that he is at best misinformed, or just couldn't give a damn.
How sensible is it to create BTV PZ areas one day, and then allow free traffic of stock from endemic areas of the EU the next? Doesn't exactly give farmers in those zones who actually want to protect their stock a fighting chance, does it? For at least 60 days, until our own vaccinated stock has had time to build immunity, 'provisional' entry should have been arranged, and then only for completely vaccinated / documented imports. (Italy has this system, I'm told)