A cyber attack described as the "biggest ever" to hit the UK charity sector has been attributed to a "huge human error", with millions of people warned that their personal data may have been stolen. The scale of the breach has raised serious concerns about data security practices across charitable organisations, which routinely hold sensitive information on donors, beneficiaries and staff.

Full details of the incident, including which charities or systems were affected and how the error occurred, were not available in the source material provided. Those whose data may be at risk are being urged to remain vigilant for potential misuse of their personal information.