Law enforcement agencies estimate that hundreds of millions of pounds of dirty money are deposited at UK post offices each year, a figure that has grown as bank branches close and post offices become a primary conduit for cash. Yet police investigations into this form of organised crime are being hampered by the legacy of the Post Office Horizon scandal, which has made officers wary of prosecuting cases that rely on data from the discredited computer system. This reluctance, combined with a streamlined deposit process that lacks basic checks, has created a “reverse funnel effect” that criminals are exploiting with increasing impunity, according to officials and former employees familiar with the system.
The Gheewala case: a £53m laundering operation
One of the most significant cases to come to light involved Jigar Gheewala, an unemployed man from Leicester who lived in a £1.3m house and sent his three children to private school despite being a declared bankrupt. In 2020, his bank account received more than £880,000 in cash across 200 separate deposits, all made at post office branches in Leicester. “He was a declared bankrupt, with a bank account that was absolutely not reflective of what it should be,” said Laura Panter, financial crime supervisor at Leicestershire police’s economic crime team. “That was our starting point.”
Gheewala’s operation, codenamed Operation Kilo, began in 2021 and culminated in December 2025 with his sentencing to almost 12 years in prison, along with six co-conspirators. Over two years, the group moved £53m, using couriers who brought bags of cash from London and Yorkshire to Leicester, where underlings distributed the money among a network of “mules” who paid it into as many as 10 different accounts at each post office stop. The mules, who received small payments for renting out their bank accounts, were often ordinary people or employees of Leicester’s garment businesses, where managers faked invoices to make the payments look legitimate. Gheewala controlled the operation from a laptop in an empty house, dispersing the funds worldwide via cryptocurrency exchanges as soon as they appeared online.
Systemic vulnerability: how post offices facilitate money laundering
The ease with which Gheewala operated reflects a systemic vulnerability in the post office banking system. Since 2017, post offices have accepted cash deposits on behalf of banks, and these deposits now exceed £30bn a year. The process is deliberately streamlined: a customer hands over banknotes, inserts a bank card, and enters a pin, similar to a cashpoint in reverse. Unlike at a bank, the post office operative has no access to account details, so they cannot verify whether the person with the card is its holder or whether the transaction fits a suspicious pattern. This lack of checks has made post offices an attractive target for criminals, as noted by a former Post Office employee with knowledge of its financial services: “The bad guys are genuinely targeting post offices as one of the few places left where they can actually go to put money in.”
The scale of the problem is illustrated by the growth in cash deposits. In October 2020, deposits totalled £1.9bn; by October 2025, they had risen to £2.9bn, a 50% increase in five years, even as cash usage among the general public fell to fewer than one in 10 transactions. Post Office Ltd stopped publishing monthly figures last year, citing concerns that they could alert criminals to the amount of cash on premises, but it boasted of a 10% increase in deposits in the first quarter of this year, suggesting deposits have now passed £3bn a month.
Horizon scandal’s chilling effect on investigations
The Post Office Horizon scandal, which became public knowledge after the 2024 ITV drama “Mr Bates vs the Post Office,” has had a lasting impact on police willingness to pursue money laundering cases. The scandal involved Post Office Ltd wrongly prosecuting hundreds of post office operatives based on faulty computer software. Documents released by the inquiry into the scandal show that in 2024, a detective constable from Blackburn police station halted an investigation into “large-scale money laundering” via post office branches in Lancashire, fearing that defence lawyers would discredit evidence originating from the Horizon system. One officer, who asked to remain anonymous, said: “After the Mr Bates TV show, it became a real hot potato and nobody wanted to get hold of it. For every case that’s brought, there are many more in the background. There is no real appetite to do anything unless it’s a slam dunk, because the public is on the side of the post office operatives.”
This reluctance has allowed criminals to continue exploiting the system. In April 2025, a man from Cheltenham was jailed for six years and eight months for controlling a network of mules that paid millions of pounds into post offices in Bristol and Gloucestershire. Two men were jailed at Southwark crown court in 2024 for paying £26m into post offices in London and Manchester before their arrests in 2017. Students have also been jailed in Scotland for similar offences, and other cases are ongoing.
Efforts to close the gap and the cost of inaction
Regulators have made some attempts to address the problem. In 2023, the Financial Conduct Authority (FCA) imposed limits on how much cash could be deposited at post offices at any one time, but this was met with immediate backlash. Post Office Ltd argued that the limits penalised hard-pressed businesses, with Ross Borkett, then head of banking, saying: “They are hurting legitimate customers and businesses who need support.” Cash-intensive businesses lobbied MPs, leading to parliamentary debates, and ministers promised to ensure that those reliant on cash would always be able to use it. As a result, the FCA’s limits are likely to be the last intervention to make payments at post offices harder.
The financial stakes are high for Post Office Ltd, which is already struggling with the cost of compensating victims of the Horizon scandal—more than £1bn has been distributed, pushing it into a deep annual loss. Banking services, however, have become a crucial revenue stream: in its 2024-5 accounts, Post Office Ltd posted revenues of £309m from “banking and ATMs,” more than a third of its total revenue and only slightly less than earnings from handling mail. Individual post office operatives also earn a fee for every deposit they accept, creating a potential incentive to look the other way.
Despite the success of Operation Kilo, Detective Constable Catherine Richards of Leicestershire police was not optimistic that Gheewala’s conviction would change the broader picture. “Crime is continuing,” she said. “Money needs to be laundered. And, yeah, somebody else fills those boots, don’t they?”
