london prime minister theresa may make speech britain future relationship european union sept. 22 italian city florence spokesman say wednesday speech focus kind tie britain want eu leave bloc march 2019 something british negotiators keen discuss so-far reluctant brussels prime minister want give speech uk future relationship europe historical heart may spokesman tell reporters underline government wish deep special partnership european union uk leave eu negotiations term divorce eu make limit progress since may start two-year countdown brexit prompt warn eu discussions future relationship two could push back intend start time october september round brexit talk push back week end month eu diplomats say move design allow may make speech britain say reschedule allow side time make progress may speech could add weight british push move talk forward minister say crucial step provide certainty businesses worry brexit affect ability trade across border choice venue city celebrate birthplace renaissance period make wealthy international trade bank nod kind free-trading relationship britain want maintain europe develop globally sceptics say british approach amount cherry pick benefit eu membership without pay uk deep cultural economic tie span centuries florence city know historical trade power spokesman say uk leave eu retain close tie prime minister say many time leave eu europe uk pm may make brexit speech italy sept. 22 spokesman