Party leader Tim Farron announced that the Lib Dems will fight the next general election on staying in the EU. Millions of people have signed a petition asking for a new referendum, because they feel cheated by the deception of the leave campaign.
Within hours of the referendum, all the key figures of the leave campaign backed out of their promises including NHS funding and immigration.
The vote to leave Europe has triggered the biggest crisis in Britain for decades. Only the Lib Dems are standing up for the millions of people who are worried about the future holds. Over 18,000 people have joined the party in recent weeks, because they want to be part of the movement that will keep Britain in Europe.