brussels european union leaders agree week start prepare internally talk britain post-brexit transition accord new draft summit statement spell condition london must meet negotiations start draft l8n1mr56r see reuters monday circulate summit chair donald tusk 27 member governments discussion minister tuesday ahead summit british prime minister theresa may thursday friday follow objections heavyweight power germany france first draft last week text somewhat harden requirement london meet condition set eu soften suggestion forego conclusion leaders agree launch trade talk december however retain instruction eu officials start internal preparatory discussions eu would negotiate transition future trade relationship officials say could save weeks delay december summit indeed give green light second phase talk eu maintain summit gesture may condition