Lehmans terms why is this such a big deal? ., ., , ., ., deal? the northern ireland protocol is the aspect deal? the northern ireland protocol is the aspect of deal? the northern ireland protocol is the aspect of the deal? the northern ireland protocol is the aspect of the brexit is the aspect of the brexit agreement that was reached between the uk and the eu to facilitate the uk s departure as a member state, focusing on northern ireland and covers areas from the maintenance of human rights protections to trade aspects so with the uk leaving the eu that instilled the need for an external frontier of the eu to be established in terms of where that boundary would exist between the uk and the eu. the island of ireland presented a challenge to that, not least with regard to northern ireland given its troubled past, the good friday agreement, and there was a lot of difficult negotiation around where the border would be placed and what sort of form it would take and the resolution r