Boris Johnson says he is 'rock solid confident' of EU deal
The Foreign Secretary, speaking during a visit to Estonia, urged both sides to work together to solve the thorny issue of the Irish border, Sky News reports.
"I think we can all work together to come up with a solution on that one. It is not beyond the wit of man," he said. "We've had a common travel area between the north and the south of Ireland for getting on for a century and we're going to continue to make that work."
The EU's chief Brexit negotiator, Michel Barnier, said on Thursday he was worried by the UK's plans for the border arrangement with the Republic of Ireland.
Mr Barnier said the British Government wanted to use Ireland as a "kind of test case" for its customs relations with the rest of the EU.