Who 'lost out'?
"However, at least seven trusts, including Great Ormond Street Hospital, have lost out after striking deals they thought would be worth millions of pounds in exchange for sharing patient data"
So they didn't get the shares they were offered in exchange for handing over patient data. My heart bleeds for them. I doubt that the cost of 'de-identifying' was a significant loss.
Having worked in healthcare I can safely assert that absolutely anyone's entire health record is impossible to 'de-identify' as it's unique to the individual and it's surprising how little of it is needed in many cases to identify them.And it's been formally demonstrated that when personal data is 'de-identified' its utility declines a lot faster than its actual anonymity improves.
So there's now a stash of (what was it?) 12 million health records of individuals floating about somewhere after the company went bust. I guess it's the data subjects that have really 'lost out', not the hospital trusts. The latter must be forced to recognise that it's not their data.