The Liberal Democrats have vowed to cancel Brexit if they win a majority at the next general election.
Members of the party today voted in favour of a motion to revoke Article 50 – the mechanism that allows the UK to leave the EU – if they emerge as the largest party in a national poll.
The Lib Dems’ policy was previously to hold a second referendum in which they would campaign to remain in the EU.
Former Labour MP Chuka Umunna, who joined the Lib Dems in June, tweeted:
The Lib Dems now have 18 MPs in Westminster, with former Tory MP Sam Gyimah joining on the first day of its party conference yesterday.