Ministers have warned that the UK could take longer to leave the EU than expected, even as May prepares to trigger Article 50 of the Lisbon Treaty, which would begin the process.
Deutsche Welle: Brexit could be pushed back until 2019
(Brexit) This file photo taken on May 27, 2016 shows The British Union flag (L) and the European Union (EU) flag flying side-by-side outside City Hall, the headquarters of the Greater London Authority, in central London. (Leon Neal / AFP)
