brussels european union hand prime minister theresa may 10-day absolute deadline improve brexit divorce offer face failure persuade eu leaders open trade talk britain december summit without deal next month time tight agree arrangements britain leave eu march 2019 add pressure businesses avoid potential losses move investments need see progress uk within 10 days issue include ireland european council president donald tusk tweet meet may brussels one hour follow eu summit deal northern ireland border become suddenly tricky friday dublin government look set fall tusk say still possible 27 eu leaders would conclude summit dec. 14-15 britain make sufficient progress toward meet three key condition approve open trade talk new year add former polish premier chair bloc summit meet still huge challenge eu officials expect crunch come may return monday dec. meet eu chief executive european commission president jean-claude juncker chief brexit negotiator michel barnier tusk present timeline ... december absolute deadline uk make additional efforts allow barnier position recommend sufficient progress eu official say may agree time frame uk need give credible assurances avoid hard border december still unclear do official add complication lay ireland prime minister leo varadkar warn veto without big british move border issue may call snap election next week separate issue may tell reporters meet tusk two side still make progress toward close gap financial settlement right expatriate brexit avoid hard border may disrupt peace northern ireland add still issue across various matter negotiate resolve repeat line first use september britain would honour commitments sign detail eu counterparts demand payments accede london call talk post-brexit trade pact irish border may say irish government continue talk solutions desire want ensure movement people trade across border carry months eu demand britain pay something like 60 billion euros 72 billion seem tough nut crack eu negotiators encourage apparent leak british media indicate may back brexit hardliners cabinet offer large sum ireland could stick point irish issue worry chance sufficient progress december 50-50. maybe less official handle brexit talk one 27 eu state tell reuters sideline friday summit barnier throw union weight behind ireland friday tell irish foreign minister simon coveney strong solidarity ireland irish issue eu issue coveney accuse government opponents irresponsible call no-confidence motion tuesday unrelated issue say ireland would agree open eu trade talk britain unhappy border may northern irish pro-brexit ally depend slim parliamentary majority accuse dublin try force northern ireland whole unite kingdom stay customs union eu deprive freedom set commercial regulations eu officials say best way avoid hard border keep regulations whether northern ireland across uk britain reject former would divide northern ireland british mainland brexit campaigners say britain follow eu rule ten days crack brexit deal eu tell may