While conducting Brexit negotiations during her term as British Prime Minister,
Theresa May stated "no UK prime minister could ever agree" to an Irish Sea border. Similarly, in August 2020,
Boris Johnson said that "There will be no border down the Irish Sea – over my dead body". The
Democratic Unionist Party (DUP) supported Brexit, but "opposed the protocol and voted against it in the House of Commons." Some Unionists, according to
The Independent, believed that: "the Brexit deal has cut NI adrift from the rest of the UK, pushing Belfast further away from London, paving the way for an economic united Ireland", and
loyalists called for the arrangement to be removed or, furthermore, for the collapse of the devolved administration. The governing DUP, however, said that "It would be a foolish idea to collapse devolution. It would remove the party who opposed the NI Protocol and give all power for Northern Ireland back to the UK government, who created and implemented the NI Protocol." Speaking before Westminster voted to ratify the Trade Agreement,
Lord Empey (chairman of the
Ulster Unionist Party) argued that the Protocol came about because the DUP had indicated acceptance of it. He said that he had "pointed out that, immediately this document was released, Arlene Foster and her DUP colleagues endorsed these proposals, describing them as 'a serious and sensible way forward'". In January 2021, graffiti reading "all border control post staff are targets" was painted onto a wall near Larne port. On 1 February,
DAERA instructed Border Control Post staff in Larne and Belfast to "temporarily suspend" physical controls on Products of Animal Origin, pending talks with the
Police Service of Northern Ireland (PSNI), due to threats to the safety of staff. "Full documentary checks" continued as usual. ==2022 Northern Ireland Assembly election and subsequent vote on continuance==