Conservative Party (UK)

UK lawmakers battle over Brexit amid customs chaos warning

A fragile government, a legislative minefield and a jittery economy are turning up the tension as Britain tries to turn its vote to leave the European Union into a reality.

Exit negotiations with the bloc are stalled on divorce terms, and on Tuesday Prime Minister Theresa May's government battled to push its central piece of Brexit legislation through a divided Parliament.

The European Union (Withdrawal) Bill is designed to prevent a legal vacuum by converting some 12,000 EU laws into British statute on the day the U.K. leaves the bloc in March 2019.

But many lawmakers claim the bill gives the government too much power to amend legislation without parliamentary...