Tommy Robinson has announced he will stand in the forthcoming European elections.
The former English Defence League leader, whose real name is Stephen Yaxley-Lennon, pledged to represent "the working class of England" if elected as an Independent MEP in the North West.
In a letter on his website he claimed politicians including Theresa May, Jeremy Corbyn and those in the European Union are "laughing at us".
He said: "17.4 million of us voted for Brexit, but they don't care about people like us. They've tried to silence us, and they took away our democratic rights by betraying Brexit."
He went on to describe Nigel Farage, who has launched the Brexit Party, as "just another millionaire stockbroker who looks down at the working classes".
He will continue as an adviser to Ukip leader Gerard Batten, despite running against eight of the party's candidates, a spokesman for Ukip said.
He is unable to join Ukip's membership under party rules because anyone who has previously been an English Defence League member is banned.
The spokesman said: "Mr Robinson has chosen to stand as an independent and we will be standing our full slate of candidates in the North West.
"Ukip is committed to getting Ukip members elected to the European Parliament first and foremost."
Anti-extremism campaigners Hope Not Hate called for voters to sign up to oppose the "far-right thug".
Chief executive Nick Lowles said: "Stephen Lennon is a far-right thug who uses his platform to bully, abuse and stir up division, monetising his hatred to rake in donations from his fans.
"In these Euro elections, the fewer people who vote, the easier it is for extremists to win a seat, so if you've ever been appalled or angered by Stephen Lennon's constant diet of fake news, hatred and abuse towards others, then you need to ensure you, your friends, family and community turn up and vote on May 23.
"The North West needs a voice of hope, not hatred."
Ahead of a visit to Manchester by Mr Robinson on Thursday evening, Labour MP Mike Kane, speaking in the Commons, said the activist is "not welcome to spread his xenophobic, Islamophobic, homophobic, racist vitriol in my community or in any other community".
Mr Kane added: "He seeks to divide rather than to unite people. We do things differently in Manchester, we stand together against hate."
The other candidates standing in the European Elections are:
Change UK - The Independent Group
Andrea Cooper, Dan Price, Arun Rammoy Colin Banerji, Michael Stewart Taylor, Philippa Olive, Victoria Ann Desmond, Andrew Paul Graystone, Elisabeth Malisa Knight
Conservative and Unionist Party
Sajjad Haider Karim, Kevin Michael Beaty, Jane Elizabeth Ann Howard, Arnold Saunders, Wendy Maisey, Thomas Baxter Lord, Anthony Pickles, Attika Salim Choudhary
English Democrats English Democrats - "Putting England First!"
Stephen Morris, Valerie Morris
Gina Dowding, Wendy Kay Olsen, Jessica Ayesha Northey, Geraldine Philomena Coggins, Rosie Mae Mills, Astrid Johnson, Daniel Adam Jerrome, James Andrew Booth
Theresa Mary Griffin, Julie Carolyn Ward, Wajid Iltaf Khan, Erica Ruth Estelle Lewis, David John Brennan, Claire Emily Cozler, Saf Ismail, Yvonne Marion Tennant
Chris Davies, Jane Elisabeth Brophy, Helen Foster-Grime, Anna Corrina Fryer, Sam Al-Hamdani, Rebecca Ann Forrest, John Studholme, Frederick Van Mierlo
The Brexit Party
Claire Regina Fox, Henrik Eyser Overgaard Nielsen, David Richard Bull, Gary Walter Harvey, Ajay Jagota, Elizabeth Oyedoyin Babade, Sally Ann Bate, John Howard Kelly
UK European Union Party (UKEUP) UK EU Party
Sophie Catherine Larroque
UK Independence Party (UKIP) UKIP Make Brexit Happen
Adam Fox McCloud Richardson, Jeff Armstrong, Fiona Rachel Mills, Nathan Alan Ryding, Michael James Felse, Ben Robert Fryer, John Charles Booker, Alexander Alan Craig
Mohmmad Aslam Independent