Vilnius: Lithuanian President Dalia Grybauskaite has said that Britain's exit from the European Union (EU) is an unprecedented case but this will, however, not break the union. Grybauskaite met European Union (EU) ambassadors residing in Vilnius on Monday. The "Leave" outcome of British referendum over the EU membership was the main topic of the discussion, the presidency said in a statement, Xinhua news agency reported. "Even after one member state's exit, the bloc of the remaining 27 members remains united," Grybauskaite was quoted as saying. In her words, the EU now faces the challenge to "learn from the Brexit lesson, preserve people's trust in Europe and prevent populist anti-European forces from using the case." Grybauskaite underlined that new relations between Britain and the EU will be set out during the negotiations process. Around 200,000 Lithuanians currently live in Britain, according to the presidency.