LONDON — A year ago Friday, voters made the historic decision for Britain to leave the European Union, more than 40 years after it joined what was then known as the European Economic Community. And a year later, Britain is still debating what form of divorce it will be and how a future relationship with the bloc might look.

The unexpected victory for supporters of an exit, known as Brexit, was a blow to the Conservative prime minister, David Cameron, who announced his resignation the next morning. After a messy succession squabble, Theresa May became a kind of accidental prime minister. But her gamble this month to hold another election as a way to win an enhanced majority to support a “hard” version of “Brexit” has backfired badly, damaging her authority and raising new questions about what Britain really wants from “Brexit.”

Negotiations in Brussels began on Monday. But deal or no deal, Britain will be out of the European Union on March 29, 2019 — whether to a bright and glorious future or to years of regret remains to be seen.

Before the vote and over the past year, reporters from The New York Times have delved into questions of identity, economics, finance and politics surrounding “Brexit.” Read seven of our favorites. — STEVEN ERLANGER