Re: Right to opt out
Keep shouting this very loudly.
Your patient data is not anonymous. Each of us has a unique transaction history. You only need to know a few of those transactions to identify a patient.
I did some work for a company that does scans for the NHS. This was around the time that David Beckham was being scanned for his metatarsal. Wouldn't have taken much to find that in the data. If that had been part of his NHS data, it would have been trivial to have his entire medical history.