Britain's Prime Minister Theresa May arrives at an EU summit in Brussels, Belgium, October 17, 2017. REUTERS/Dario Pignatelli

LONDON (Reuters) - British Prime Minister Theresa May said on Monday she was “ambitious and positive” about the country’s future and its negotiations to leave the European Union, describing the talks as being conducted in a “constructive spirit”.

“I am ambitious and positive about Britain’s future and these negotiations,” she told parliament. “If we are going to take a step forward together it must be on the basis of joint effort and endeavor between the UK and the EU.”