Reform's Lee Anderson has warned that the "people's army is on the march" after his party received a huge boost in the General Election.
Anderson was elected alongside party leader Nigel Farage and three others.
Tory insiders were particularly worried about the rise of Reform following Farage's return to frontline politics.
Speaking to GB News, Anderson said: "It's not just about having MPs in the House of Commons, it's about having a national platform as well.
Lee Anderson warned the "people's army is on the march"
GB News
"It's about growing an army of people. You've probably heard this time and time again over the past six or seven weeks. The People's Army is on the march and the People's Army are Reformers.
"People are supporting people like me and Richard and Nigel. People are fed up with mainstream politics. They've chosen something different. They're engaged.
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"We saw the conference a few weeks back in Birmingham when 5,000 people turned up.
"There's a demand out there by the British public certain parts of the British public for something different. Reform UK offers something different to the people."
Speaking about the Reform leader, he said: "Nigel is there to stay. He's made a massive decision to come back and It's paid off.
"The gambles paid off and now he is a member of Parliament for Clacton. He's our leader. He's going to lead us into the next election."
Richard Tice, Nigel Farage, Lee Anderson and Rupert Lowe were elected for Reform
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Farage used his victory speech to warn Labour about what could happen next.
After overturning a 24,702 Tory majority to win by 8,405 votes, Farage said: "There is a massive gap on the centre-right of British politics and my job is to fill it."
Taking aim at Labour, the Reform UK leader warned: "What is interesting is, there's no enthusiasm for Labour, there's no enthusiasm for Starmer whatsoever.
"In fact, about half of the vote is simply an anti-Conservative vote. We're coming for Labour, be in no doubt about that."
Nigel Farage is the Reform UK leader
PAHe added: "It's four weeks and three days since I decided to come out of retirement and throw my hat in the ring.
"I think what Reform UK has achieved, in those just few short weeks, is truly extraordinary.
"Given that we had no money, no branch structure, virtually no nothing across the country, we are going to come second in hundreds of constituencies.
"How many seats are we going to win? I don't know. But to have done this in such a short space of time says something very fundamental is happening."