The Independent Group formed by breakaway ex-Labour and Tory MPs has become a fully-fledged political party and will fight the European elections.
Their new party, Change UK – The Independent Group, will stand on a pro-EU platform calling for a second referendum.
The party claims to have had more than 3,700 applications from people wanting to stand as Change UK candidates in the May 23 election and it has begun the process of shortlisting and interviewing potential MEPs.
Some 70 candidates will be fielded by the party after it completed the registration process with the Electoral Commission.
However, it has also been reported that the party’s emblem for the ballot paper had been rejected.
The emblem was set to be a black square with the initials ‘TIG’ and the hashtag #change, but the Electoral Commission ruled it was “likely to mislead voters”.
The commission added that their acronym was not “sufficiently well-known” to give the public a clear idea of who they were voting for.
Change UK's interim leader Heidi Allen said: "This is a fight for Britain's voice in Europe - and we have been overwhelmed by the thousands of people wanting to roll up their sleeves and join our campaign from every walk of life and every corner of the country.
"Change UK - The Independent Group have a clear message in the European elections: we demand a People's Vote and, if it is held, all our MPs will campaign to remain in and reform the European Union."
She pleaded for donations to a "fighting fund" to allow Change UK to challenge the established parties.
"We are David, and they are Goliath - but we can do this together," she said.
The party will launch its election campaign on April 23.