The ransomware attack on the pathology services provider disrupted operations at several London hospitals.
November 13, 2025 By Ionut Arghire
Pathology services provider Synnovis has confirmed that patient personal information was stolen in a June 2024 ransomware attack that disrupted the operations of several London hospitals.
Formed as a partnership between King’s College Hospitals NHS Trust, Guy’s and St Thomas’ NHS Foundation Trust, and SYNLAB, the organization provides pathology laboratory services to hospitals, mainly in southeast London.
The ransomware attack on Synnovis occurred on June 3 and affected all IT systems, interrupting its services and forcing hospitals to cancel operations and send patients away.
Synnovis did not pay a ransom but worked with authorities and cyber experts to contain and investigate the attack. It rebuilt the affected IT infrastructure from scratch and was able to restore all impacted services by late 2024.
On June 20, 2024, the Qilin ransomware gang claimed responsibility for the attack. The group has published roughly 400 gigabytes of data allegedly stolen from Synnovis.
