Jeremy Corbyn has said a leaked document obtained by Labour shows Boris Johnson is “misrepresenting” his Brexit deal and the “devastating” impact it will have on Northern Ireland.
He called the paper “hard evidence” NI would be “symbolically separated” from the rest of the UK after Brexit, with customs checks on goods.
Mr Johnson has repeatedly said there will be no border in the Irish Sea.
He dismissed Labour’s claims as “complete nonsense”.
Pressed on the issue during a campaign visit in Kent, the prime minister said his was a “fantastic deal” and the only checks would be on British exports to the Republic of Ireland going via Northern Ireland.
The Conservatives also said the leaked Treasury document was an “immediate assessment, not a detailed analysis”.
It had not been