The previous chief Brexit negotiator additionally insisted there was no want for a commerce conflict and that it could not be the UK’s selection.
The EU has threatened to retaliate with “all measures at its disposal” if the UK proceeds with new laws overwriting sections of the protocol.
Critics have warned it could be an “unacceptable breach” of worldwide regulation and gas mistrust of Britain.
The treaty agreed by the UK and EU as a strategy to preserve a free-flowing Irish land border has created financial obstacles on the motion of products between Nice Britain and Northern Eire, inflicting resentment and anger amongst many unionists and loyalists.
The row has created an deadlock in efforts to type a devolved authorities administration in Belfast.
The UK is planning unilateral motion to introduce separate “inexperienced” and “pink” lanes for items travelling between Nice Britain and Northern Eire, drawing a line between these destined to remain inside the UK and people heading to the Republic of Eire and past.
Talking within the Lords for the primary time since resigning from the frontbench final 12 months, Lord Frost stated: “We’re informed that fixing very apparent issues with the Northern Eire Protocol will trigger, it’s stated, ‘large and irreparable injury to our overseas relations and worldwide status’. I don’t agree with that.
“Any observer can see that protocol is undermining the Belfast Settlement, it’s weakening the Authorities’s skill to manipulate Northern Eire. Any observer can see it wants fixing.
“There isn’t a want for a commerce conflict. If it comes, it received’t be our selection, I assume. Some argue that the conflict in Ukraine makes it the incorrect second to handle this query. Quite the opposite, I believe the good occasions which can be below approach make it all of the extra vital for us to repair the problems which can be dividing western international locations.
“To me it makes it all of the extra stunning and disappointing that the EU won’t assist us resolve this downside and continues to be so unconstructive.”
He added: “In fact it’s proper that we must always stay open to negotiation; a negotiated settlement would nonetheless be higher.
“However in my expertise solely readability about goals and robustness in presenting them will get outcomes, and realizing the Overseas Secretary I’m certain that’s how she is going to intend to proceed.”
Nevertheless, former nationwide safety adviser Lord Ricketts warned: “Seen within the perspective of a serious conflict in Europe, each the substance and timing of which can be massively ill-judged, in my opinion.
“If pursued it can affirm the view in European capitals that Britain is to not be trusted.”
He added: “Let’s again down from the brink of a serious breach with the EU and let’s work along with EU international locations for peace and stability in Europe.”
Lord Hannay of Chiswick, who served as UK ambassador to each the EU and UN, stated: “This isn’t the time to float right into a confrontation over the implementation of the Northern Eire Protocol or to be threatening to take unilateral motion to put aside specific provisions within the Withdrawal Settlement. That’s the peak of irresponsibility.”
Former terror regulation watchdog and main lawyer Lord Carlile of Berriew, stated: “The breaking of that treaty by the UK is an unacceptable breach not simply of the regulation however the regulation of countries and what’s greater in regulation than the regulation of countries?”
Unbiased crossbencher and former ambassador Lord Kerr of Kinlochard, who was creator of the Article 50 mechanism by which the UK left the EU, warned the Lords might reject laws that sought to unilaterally make modifications to the protocol.
He stated: “I would love folks to imagine that, in the event that they conclude a cope with us, then that deal is prone to stick. That makes it simpler to conclude a deal.
“I would love folks to suppose it unthinkable that we might break a treaty dedication and begin a commerce conflict.
“I believe this Home nonetheless champions the rule of regulation.”