Luxembourg (AP) - A Brexit meeting of British Prime Minister Boris Johnson with European Commission President Jean-Claude Juncker has initially brought no tangible results. Juncker then stated that it was up to the UK to put forward proposals that were viable and compatible with the exit agreement that had already been concluded. "Such proposals have not yet been made," he added. The EU Commission will remain available around the clock, it said. Johnson wants to enforce changes to the EU exit agreement until the EU summit on 17 and 18 October, which the EU rejects so far.