The UK’s largest National Health Service (NHS) trust has yet again suffered a ransomware attack on its systems, compromising data of about 2.5 million patients, media reports said. Calling it to be “the biggest breach of healthcare data in the United Kingdom”, the notorious ransomware gang BlackCat claimed to have stolen 70 terabytes of sensitive data from Barts Health NHS Trust, which runs five London-based hospitals, the TechCrunch reported.