European Council President Donald Tusk said Monday that an extension to the March 29 deadline for Britain to leave the EU would be a "rational solution" given political developments.

European Council President Donald Tusk attends a news conference after the extraordinary EU leaders summit to finalise and formalise the Brexit agreement in Brussels, Belgium November 25, 2018. (File photo: VCG)

"I believe in the situation we are in, an extension would be a rational solution," Tusk told a press conference ending an Arab-EU summit where he also consulted privately with British Prime Minister Theresa May.