"An agreement is within reach if both sides are willing to work constructively, compromise and working to make progress on the basis of legal texts and if we are able in the coming days to resolve the sticking points," Michel Barnier said.

"Time is of essence... Along with our British counterparts, we must find solutions to the most difficult areas."

(Reporting by Gabriela Baczynska, Marine Strauss; editing by Francesco Guarascio)