A ransomware attack on Synnovis in June impacted several major NHS hospitals in London, disrupting operations and forcing some healthcare procedures to be cancelled.
The attack resulted in the personal information of over 900,000 individuals being published online.
The leaked data includes sensitive information such as patients' medical conditions, histology tests, and contact details.
Synnovis obtained a preliminary injunction to prevent the publication of stolen data and Telegram blocked the channel used by the ransomware group to leak the data.