brussels britain european union postpone new round brexit negotiations week end month eu diplomats say allow time prime minister theresa may make key speech 10 days confirm delay sept. 25 brussels expect british government say statement joint decision take time consultation would give negotiators flexibility make progress confirmation london may make speech around sept. 21. immediate official comment european commission eu executive however diplomats eu capital say tell tuesday negotiations put back reason uk political calendar rather reason brussels eu officials diplomats expect may make keynote speech around sept. 21 believe may use outline kind transition arrangements britain want leave union march 2019 long-term treaty set free trade pact fully negotiate implement eu chief negotiator michel barnier like counterpart british brexit minister david davis play significance precise time talk brussels last round late august barnier say side far apart term britain leave raise doubt whether two round schedule eu summit oct. 19-20 would show enough progress let leaders agree launch negotiations post-brexit relationship eu source doubt may ready give grind early month eu demand notably britain pay tens billions euros dollars leave early october face tricky first conservative party conference since lose parliamentary majority ill-advised snap election rather eu officials expect may speak detail late month transition may explain impatient brexit supporters britain may remain inside eu structure pay brussels privilege years avoid cliff-edge disruption trade business policy statement may whose divide minister lately speak unanimously favor transition would mean shift negotiate stance divorce issue expatriate right much britain pay leave land border control ireland however delay brussels talk may make easy prime minister get message without distraction britain keen move discuss future relationship transition soon possible argue issue ultimately intertwine 27 national leaders insist however divorce talk must show sufficient progress deliberately vague phrase negotiate future trade deal brexit talk put back week eu expect may speech