The European Union and Britain agreed Thursday a draft declaration on their post-Brexit relations that sets out an "ambitious, broad, deep and flexible partnership," officials said.

The two sides have also agreed a draft deal extending the transition period by one or two years beyond the end of 2020, a final sticking point of the divorce deal. EU leaders still have to endorse the draft declaration, which is due to accompany a draft of agreed terms for Britain's withdrawal from the bloc on March 29.