Johnson declines to say whether Northern Ireland will stay in EU customs union after Brexit

• "I think it would be wrong of me to give a running commentary on the negotiations" said UK Prime Minister .

"I think it would be wrong of me to give a running commentary on the negotiations," he said. "Look at everything I've said previously and you can draw your own conclusions from that."

"I can tell you that under no circumstances will we see anything that damages the ability of the whole of the United Kingdom to take full advantage of Brexit and that is what people would expect."