Brexit Minister Martin Callanan said the decision would "weaken the U.K.'s hand in our negotiations with the EU by giving Parliament unprecedented powers." It's not clear whether the amendment will be approved by lawmakers when the bill goes back to the elected House of Commons. The Northern Ireland-Ireland border will be the U.K.'s only land frontier with the EU after Brexit. But Britain also says it will leave the EU's tariff-free customs union. Britain rejects the EU's suggestion, which is to keep Northern Ireland inside the bloc's customs union.

Source: ABC News April 30, 2018 14:11 UTC