Brussels • European leaders on Sunday signed off on their split from Britain, approving a deal that would set the United Kingdom on a new, if uncertain, road, independent from the European Union after more than four decades of membership in the political and economic powerhouse.
The agreement — “historic,” according to German Chancellor Angela Merkel — will cut Britain out of the European Union, marking the first time a nation has ever sought to depart. But the deal must still weather Britain’s political storms ahead of the official March 29 exit date, with the key test next month when the U.