Nigel Farage's political rivals, including the Labour, Conservative, Liberal Democrat, and Green parties, have all ruled out standing in the Clacton by-election. The contest was triggered after Reform UK leader Farage announced his resignation from Parliament.

Farage stated that he would re-fight the Essex seat, billing the by-election as a contest between "the people versus the establishment." His resignation followed increasing scrutiny over his finances and an ongoing parliamentary investigation. Farage has insisted he has done nothing wrong, suggesting the establishment is using "foul means" to target him and his party.

Labour described the election as a "circus" and a "pathetic" attempt by Farage to "change the subject" from the investigation into his finances. A spokesperson stated the party would not "indulge" him and that he should "face the consequences" of the standards inquiry.

Conservative leader Kemi Badenoch echoed this sentiment, calling it a "fake election" designed to distract from current events. The Liberal Democrats urged the government to block Farage's resignation until the standards investigation concluded, arguing constituents deserved "all the facts."

Restore Britain, a party founded by Rupert Lowe after his suspension from Reform UK, also confirmed it would not stand in this election. However, they indicated they might contest a future by-election if the standards inquiry ultimately triggers one. The Green Party of England and Wales initially left the decision to local members, who later decided not to field a candidate.

Comedian Jon Harvey, known for running in by-elections under the pseudonym Count Binface, has confirmed his intention to stand. Farage, in a video statement, railed against the media and the treatment of his family, framing the by-election as an opportunity to "stick two fingers up to the entire establishment."

Reform UK sources have indicated a desire for a swift election, which could potentially be scheduled for August under parliamentary rules. Farage himself acknowledged the move was a "big gamble." Reform UK has offered to cover the costs of the by-election, which typically fall to central government funds. A 2016 estimate placed the cost of a by-election at over £228,000, a figure likely to have increased since.

Farage won the Clacton constituency in the 2024 general election with a majority of over 8,000 votes, surpassing the Conservatives. The parliamentary investigation into Farage's finances is being conducted by standards commissioner Daniel Greenberg, initiated in May.