Re: Crucial
" it was using medical records to spot patterns and lead to early diagnosis of many serious diseases"
No it wasn't. It was to spot certain forms of Acute Kidney Injury.
Google and the Royal Free never explained why they needed patient identifying data to do that, and they never explained why they needed 1.6 million mostly unrelated records, nor why that data wasn't properly secured. That's probably because it wasn't necessary. As multiple independent investigations found.