What’s being negotiated?

Britain voted in 2016 to leave the European Union and will be out on March 29, 2019. Before then, it must agree on divorce terms and the basics of a new relationship.

Who could win?

Fishermen, possibly, some unemployed people, and British industry serving the domestic market. Also: trade experts, lawyers.

Who could lose?

The British economy will suffer for a time; so will tax receipts. Young Britons, who mostly opposed “Brexit,” will lose the right to live and work freely in Europe; export and finance industries face new costs; labs will lose funding and talent.

What motivates Britain?

Full sovereignty, especially in legal matters, and preferential trade relations. But lawmakers are still arguing about what matters most.