EU's Brexit official sets 18-month deadline and tells UK to 'keep calm and negotiate'

The European Union's lead Brexit official has urged the UK to "keep calm and negotiate" as he set out an 18-month deadline for talks on a deal.

Michel Barnier's comments came as Theresa May declared that she will be aiming for a "red, white and blue Brexit" in the talks she has vowed to trigger by the end of March next year.