brussels british prime minister theresa may european commission chief jean-claude juncker agree dinner brussels monday pace negotiations britain departure european union step joint statement describe constructive friendly two-hour meet review progress make article 50 negotiations far agree efforts accelerate months come announce less 24 hours sit accompany chief brexit negotiators david davis michel barnier three days may return brussels eu summit meet hold well away reporters officials offer immediate detail substance beyond six-sentence communique side call fast pace talk time tick britain withdrawal eu march 2019 businesses warn without clarity happen may start switch investments early next year joint statement give little else away make reference mutual blame game london brussels accuse create deadlock may fail detail much will pay settle divorce obligations eu stick rigidly refusal much talk future trade deal transition wary prime minister beset feud cabinet soft hard break eu might try divide 27 state eu diplomats voice concern meet juncker barnier meet national leaders barnier diplomats say suggest accelerate talk start internal eu discussions transition period britain would stay single market idea hit resistance heavyweights germany france though 27 seem set agree gesture eu statement issue friday revise text circulate summit chair donald tusk eu governments monday retain word offer britain chance talk transition future relationship almost immediately next eu summit december german french insistence stress need london meet series key demand union notably money owe may spokesman ask meet whether would give detail britain financial offer indicate would leave wonder point either expensive dinner cost 30 billion euros else one eu diplomat say may juncker call fast brexit talk