Andrew Clayworth, a former Labour parliamentary candidate, will stand for the Trade Unionist and Socialist Coalition (TUSC) in the general election in Nottingham South.
He represented Labour against Tory Ken Clarke in Rushcliffe, Nottinghamshire, in the 2010 election.
Andrew told Socialist Worker, “I was a member of the Labour Party for years. But I felt it had gone too far to the right.
“So I went to a TUSC meeting and I was quite impressed by the people who were there. They’re true socialists.”