Jo Swinson says that her party will make "very clear" in an election campaign that "a vote for the Liberal Democrats is a vote to revoke Article 50 if we form a majority government." The Lib Dem leader accused Boris Johnson of not acting in the national interest, saying the prime minister "is prepared to ride roughshod over our democracy." Report by Jonesia. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn