Nigel Farage has accused Theresa May and the Conservatives of rebranding into Ukip.
The Prime Minister's speech at the Conservative Party Conference referenced tighter controls on immigration and grammar schools, policies which have strong support among Ukip supporters.
Farage, and leading donor Arron Banks, have hailed Theresa May's flagship address yesterday as a sign of how much Ukip has influenced British politics.
Speaking to Channel 4 News, Mr Farage called it "a remarkable speech".
He added: "It made you realise the extent to which Ukip hadn't just pushed for, gained and helped to win a referendum, but actually we've changed the centre of gravity of British politics.
"Virtually everything she said in that speech are things I've said to the Ukip conference over the last five or six years."
Farage has returned as interim leader of the party after the shock resignation of Diane James, but has made it clear he does not want the job full-time.