Brexit talks to focus first on orderly exit

Brussels • Talks on Britain leaving the European Union began Monday with both sides saying they will focus first on an orderly withdrawal: a deal for citizens living in each other’s territory, border arrangements between Ireland and the U.K. and the amount that Britain will pay to get out of previous EU commitments.

Both EU negotiator Michel Barnier and his British counterpart David Davis said after the first negotiating session they were confident of quick progress but said major challenges lay...