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UK doesn't know how much massive Afghan data leak will cost, watchdog says

Published by Global Banking & Finance Review

Posted on September 2, 2025

2 min read

· Last updated: January 22, 2026

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LONDON (Reuters) -Britain's defence ministry does not know how exactly much it will cost to relocate thousands of Afghans after a massive data leak, the government's spending watchdog said, adding it

UK Uncertain on Costs of Afghan Data Leak Relocation Efforts

Impact of Afghan Data Leak on UK Relocation Efforts

LONDON (Reuters) -Britain's defence ministry does not know how exactly much it will cost to relocate thousands of Afghans after a massive data leak, the government's spending watchdog said, adding it did not have confidence in the current estimate of 850 million pounds.

In July, it was revealed that Britain had set up a secret scheme in 2022 to bring Afghans back to the UK after their personal details were leaked, putting them at risk of reprisals from the Taliban after their return to power.

The incident ranks among Britain's worst security breaches ever due to the cost and risk posed to the lives of thousands of Afghans, some of whom fought alongside British forces against Taliban insurgents until their chaotic withdrawal in 2021.

Details of the Data Breach

In a report released on Wednesday, the National Audit Office said the Ministry of Defence (MoD) could not calculate how much it had spent on the Afghanistan Response Route scheme, and cast doubt on the 850-million-pound ($1.15 billion) figure for total costs, which did not include possible claims for compensation.

Government Response and Apology

"At the time of publication, the MoD had not provided us with sufficient evidence to give us confidence regarding the completeness and accuracy of these estimates," the report said.

The leak occurred in early 2022 after an MoD official accidentally emailed details of about 18,700 people seeking resettlement to someone outside the defence ministry, with the data then published on Facebook the following year.

Both the breach and the relocation programme were then subject to a so-called court superinjunction which prevented the media from reporting what happened.

That restriction was lifted in July when Defence Secretary John Healey issued an apology, acknowledging that the leak included information about lawmakers and senior military figures who supported Afghan allies seeking refuge in the UK.

Estimated Resettlement Numbers

In its report, the NAO said it was estimated that 7,355 people would need to be resettled through the ARR scheme, and that up to 27,278 people, relocated to Britain under the ARR or another existing programme for Afghans who had worked for or with the British government, had been affected by the leak.

($1 = 0.7402 pounds)

(Reporting by Michael Holden; editing by Mark Heinrich)

Key Takeaways

  • UK's defence ministry struggles to estimate relocation costs.
  • A data leak exposed personal details of thousands of Afghans.
  • The National Audit Office questions the 850 million pound estimate.
  • The leak ranks among the UK's worst security breaches.
  • Over 27,000 people were affected by the data breach.

Frequently Asked Questions

What is a data breach?
A data breach occurs when unauthorized individuals gain access to confidential data, often resulting in the exposure of sensitive information.
What is compensation?
Compensation refers to the payment or benefits provided to individuals for loss, injury, or damage, often as a result of legal claims.
What is security in finance?
In finance, security refers to a financial instrument that holds monetary value, such as stocks, bonds, or options, that can be traded.

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