The investigation stems from a report received in September 2025 concerning the founding of Your Party, which was established in summer 2025 by former Labour leader Jeremy Corbyn and former Labour MP Zarah Sultana, both now Your Party MPs.
Tensions between factions emerged shortly after the party's creation. In September 2025, Sultana launched a membership portal on X, encouraging supporters to pay £55 to become paying members. Corbyn described the site as a "false membership system" and told supporters to ignore an email requesting funds. Sultana said her aim was to "safeguard the grassroots involvement that is essential to building this party," and later accused the party of being run by a "sexist boys' club."
Police confirmed that a man has been arrested on suspicion of an offence under the 1990 Computer Misuse Act. He was released pending further inquiries and has not been charged. A woman in her 30s was also interviewed under caution in connection with the same investigation. Neither Corbyn nor Sultana are accused of wrongdoing, according to Politico. The man arrested and the woman interviewed are not MPs.
The Information Commissioner's Office (ICO) advised the party in January that while it was taking no further action over the membership portal launch, the incident may have involved "serious criminal activity" and should be referred to police.
A Your Party spokesperson said it would not be appropriate to comment further on ongoing police investigations, but added: "We can reassure our members and supporters that our systems are secure and that this was an isolated incident."
Your Party has struggled to make a widespread national impact since its founding, while the Green party of England and Wales has seen its membership quadruple. In February, Corbyn won a comprehensive victory to become the de facto leader of the party, saying it would work with the Greens to push for a "coordinated left-flank offensive" against Reform and Labour. Sultana was also voted onto the party's leadership committee.