Nigel Farage is set to be the only candidate from a major party to stand in a Clacton by-election after the Tories and Labour confirmed they would boycott the vote.The Reform UK leader dramatically triggered the by-election in his Essex seat by quitting as an MP amid growing pressure on him to come clean about his finances.Mr Farage vowed to let voters 'be the judges of my actions' as he faces official probes into cash and financial assistance from two wealthy allies.He said he would seek a fresh mandate from Clacton residents as he let rip – but did not take questions – over claims about his private finances that have triggered Parliamentary investigations.But the Tories, Labour and other main parties said they would not stand against Mr Farage in the by-election, with the upcoming vote branded a 'circus'.Mr Farage has been reported to authorities over claims that long-term ally George Cottrell – a convicted fraudster known as 'Posh George' – provided undeclared funding for security and staffing in the year before he was elected, as well as the use of a Westminster house.Parliament's standards commissioner Daniel Greenberg is already investigating a £5million gift the MP received from crypto-billionaire Christopher Harborne.In a more than 20-minute address on social media this afternoon, Mr Farage said he had 'never been angrier' and claimed to be the most vilified UK politician of recent times.He has denied any wrongdoing and claimed he is the target of a 'stitch-up' – a claim endorsed last night by US President Donald Trump. But this afternoon Tory leader Kemi Badenoch accused him of 'cracking under pressure' and told him to 'man up' and answer the questions he is facing instead of triggering an 'ego by-election'.She said the Tories will not stand a candidate 'in the fake by-election that Farage is causing to distract people from what is happening', adding: 'We're going to focus on getting Britain working again and showing some common sense, not throwing random by-elections out because we're having a hissy fit.' Conservative leader Kemi Badenoch was among those who questioned the decision by the Reform leader to resign his Clacton seat amid official probes into cash and financial assistance from two wealthy allies The Reform leader lashed out at the 'establishment' as he announced he would step down from his Clacton seat and seek a fresh mandate from voters in EssexMr Farage won Clacton with a majority of 8,405 in 2024, with the Conservatives a distant second.Parliamentary rules mean his decision to resign his seat and trigger the by-election suspends the investigations, though it would restart if he is re-elected, potentially setting up a second by-election in the autumn or winter if it finds against him.Mrs Badenoch said the probe needed to 'run its course', adding: 'I think the reason why Nigel Farage has resigned is because he's terrified that he's going to be found to have done something wrong.'The best thing for him to have done would have been to call a press conference and explain what he did with the money, apologise if needs be, and that would have been the end of it.'Instead, he has been running away from scrutiny. No one is bigger than Parliament. We all have to register our interests.'Prime Minister Sir Keir Starmer said it was 'a desperate stunt' from a man 'up to his neck in sleaze'.Following a meeting of party officials on Tuesday, a Labour spokesman said: 'Nigel Farage is engulfed in a sleaze scandal and he's desperately trying to change the subject.'It's pathetic, and the Labour Party is not going to indulge it.'Labour's ruling body, the National Executive Committee, has decided not to stand a candidate in this circus.'Instead, Labour will remain focused on delivering for working people and holding Reform to account.'Farage should let the parliamentary investigation into his finances run its course and face the consequences.'Restore Britain leader Rupert Lowe also said his party would not put up a candidate, while Liberal Democrat leader Ed Davey also backed a boycott of what he said was a 'vanity project'.But so-called 'Count Binface', who stood against Andy Burnham in last month's Makerfield by-election, vowed to contest the Clacton seat. In his lengthy and wide-ranging televised address, Mr Farage protested his innocence, saying he had 'done nothing wrong... I have not broken the law in any way at all'.'Now I've decided that the people of Clacton should be the judges of my actions. This will be a people versus the establishment by-election,' he said.'It's a chance to stick two fingers up to the entire Establishment to frankly tell them where to go, and that is why I will be putting my name forward to stand in this by-election... I will fight to win.' The Sunday Times reported this weekend that Mr Cottrell, who has a fraud conviction in the United States, provided funding for staffing and security, and the use of a London townhouse.Critics have said that this should have been declared under Parliamentary rules in place at the time of Mr Farage's election in 2024, under which new MPs were required to register any gifts worth more than £300 they received in the previous 12 months, except where the gift 'could not be reasonably thought by others' to relate to their political activities.Mr Cottrell reportedly recruited and paid three staff to work on Mr Farage's social media before the General Election, and has continued to allow him to use a five-storey Georgian property he rented near Buckingham Palace. Nigel Farage is under the heaviest pressure he has faced in his time as Reform leader following reports that long-term ally George Cottrell had provided undeclared funding for security and staffing in the year before he was electedIf the probe finds against the Reform leader and suspends him from the Commons for more than 30 days he would be subject to a recall petition by voters, which could trigger the second by-election. Labour and the Liberal Democrats have already demanded a parliamentary sleaze inquiry into the latest claims. Mr Farage insisted his £5million gift from Christopher Harborne was given to him on an 'unconditional basis'.He criticised the Sunday Times investigation into his finances, saying: 'Standards are now being used as a political tool.'On the gift, it was given to me on an unconditional basis. I can do with that money exactly as I wish, but there is a much bigger reason why I'm going to need that money, and it's simply this,' he said.'For over 20 years now, I have been subject to constant demonisation by the Press for daring to be outside the consensual view on many issues.'I've been attacked again and again. I am the most physically and verbally attacked public figure or politician of modern times.'Yes, you will know of some of the incidents, milkshakes thrown in my face, placards bashed over my head, but let me promise you, you only know about a fraction of the number of times that I've been assaulted.' It came after he Mr Farage clashed with a Sky TV crew as he returned to Britain from the United States last night. Mr Farage reacted angrily when asked whether it had been a mistake not to declare the gifts, saying: 'You tell your bosses, you harass my family any more… serious consequences. That's what your organisation has done this morning. Go away.'Sky said it had not contacted anyone from Mr Farage's family about the story. He did manage to win the backing of Donald Trump last night after his transatlantic trip. The US President, a long-term ally, appeared to echo his claim that he is the victim of an 'establishment hit job'.In a post on his Truth Social platform on Monday, Trump shared a link to an article on The National Pulse website titled 'They're Running the 2024 Anti-Trump Playbook on Nigel Farage'.The article accuses the UK media of giving far more coverage to 'every gaffe, controversy, or disagreement' by Farage and Reform, while 'policy successes or growing voter support are frequently downplayed'.Mr Trump personally called Mr Farage to congratulate him on his political success in achieving the removal of Sir Keir Starmer from No10, The Times reported.