UK Demands Brexit Deal Change, EU Says, ‘Non’

Pro-EU and pro-Brexit protesters demonstrate in the rain outside the Houses of Parliament in London on Jan. 29, 2019. Jack Taylor/Getty Images

LONDON—British Prime Minister Theresa May was on a collision course with the European Union on Jan. 30, after lawmakers demanded she renegotiate a Brexit divorce deal that the other members of the bloc said they would not reopen.

Less than two months before the United Kingdom is due by law to leave the EU, investors and allies are trying to gauge whether the Brexit crisis will ultimately end up with a disorderly Brexit, a delay to Brexit, or no Brexit at all.