The Liberal Democrats in Britain have pledged to cancel Brexit altogether if they win the next election there.
The party is holding its autumn conference in Bournemouth, England.
Its members voted for the new policy on Sunday after it was moved by former party leader, Vince Cable.
Previously, the party has backed another referendum or 'People's Vote', saying they would campaign to remain in the European Union.
But the new policy means that when a UK general election is called, the party will halt Brexit without a further public vote.
Leader Jo Swinson has said the manifesto pledge made the Lib Dems the "stop Brexit" party.
She told the BBC's Andrew Marr Show: "If the Liberal Democrats win a majority at the next election, if people put [us] into government, as a majority government, the 'stop Brexit' party, then stopping Brexit is exactly what people will get."
"Yes, we will revoke Article 50."
Ms Swinson added: "We have argued that a specific Brexit deal should be put to a people's vote to give clarity.
"We still argue for that. But if we end up at a general election then I think we need to be straightforward with people and give them an option for all this Brexit chaos to stop.
"I recognise not everyone agrees with the Lib Dems on this. [But] it is genuinely what we think is right for the country."
The party also invited Brexit coordinator for the European Parliament, Guy Verhofstadt, to the conference.
While there, he was presented with a 'Bo****ks to Brexit' t-shrt.
He wrote on Twitter: "Great to be in Bournemouth to celebrate the success of the @LibDems, Britain's pro - European party.
"I picked up a new t - shirt too!"
— Guy Verhofstadt (@guyverhofstadt) September 15, 2019
The Lib Dems have seen their numbers build in Westminster, with several former members of British Prime Minister Boris Johnson's Conservative Party joining the ranks.
The latest being Sam Gyimah, after he was ejected from the party for voting against the British government on Brexit.
He is the sixth British MP to defect to the Lib Dems this year.
He was one of 21 Conservatives who voted against the party to stop a no-deal Brexit.
Additional reporting: IRN