The personal details of 1,000 patients have been accidentally released by a hospital trust to two research companies, it has been revealed.
The data breach by Heatherwood and Wexham Park Hospitals included patient NHS numbers and ethnicity details.
The information has been revealed by a BBC Radio Berkshire Freedom of Information request to the trust.
The Information Commissioner’s Office (ICO) investigated but decided not to take further action.
Read more on BBC.