LONDON — U.K. Prime Minister Boris Johnson must respect every aspect of the Brexit withdrawal agreementsMichel Barnier, former Chief Negotiator of European Union has encouraged.

Johnson and other prominent Conservative Party members called publicly for the reinstatement of Johnson. scrapping or radical overhaul of the Northern Ireland ProtocolA portion of the EU and UK withdrawal agreements were negotiated in 2019

Last year, the protocol entered into force. It was created to stop customs checks as well as an effective land frontier between Northern Ireland (which is part of the U.K.) and Republic of Ireland (which remains within the EU). It is especially important due to the EU’s ongoing negotiations with Northern Ireland. fragile peace in Northern Ireland since the Good Friday Agreement1998

However, this protocol prohibits goods from being imported into Northern Ireland by U.K. citizens. This has caused chaos among Northern Ireland’s unionists, who believe it threatens the U.K.’s status as a country.

British Foreign Secretary Liz Truss and European Commission Vice-President Maroš Šefčovič met in London on Friday for talks, but the impasse between London and BrusselsThere is little evidence of a slowing down.

With British fishermen struggling to deal with post-Brexit licensing disputes, the U.K. government was also critical of the bilateral agreement concerning fisheries found in the Withdrawal Agreement.

Speaking to CNBC exclusively on Monday ahead of the French presidential elections, in which he is supporting center-right Les Republicains candidate Valérie Pécresse, Barnier said the British prime minister would need to honor agreements made with the European Union in order to preserve relations between the U.K. and France.

“The commitments made by Mr. Johnson in the Brexit negotiation — in the first pact we negotiated, which includes the Ireland protocol, and the issue there is that of peace in Ireland, the stability of the island, and the second pact on Brexit’s trade and industry where the fisheries treaty is found — these two pacts that have been negotiated step by step, comma by comma, sentence by sentence by Mr. Johnson, and that he knows very well, must be respected, that the U.K. maintain its commitments with regard to the European Union, with regard to France,” Barnier said.

He suggested, in spite of differences about the agreements, that it was more important to look ahead at the future when it comes to relations between London and Paris.

We have many reasons not to cooperate, but on a militarily scale against terrorists, climate change and transborder cooperation. There are many reasons France should strongly collaborate with the U.K.