Boris Johnson has insisted this morning that there will be no change to Gibraltar's sovereignty without Britain's consent.

Speaking on arrival at a meeting of EU foreign ministers in Luxembourg, he said: "The sovereignty of Gibraltar is unchanged and is not going to change, and cannot conceivably change without the express support and consent of the people of Gibraltar and the United Kingdom, and that is not is going to change."

It came as Jack Straw, Labour former foreign secretary, said he did not believe the status of Gibraltar poses a major danger to a Brexit deal and that the suggestion of war "reeks of 19th century jingoism."