jonnyrovers
mostly tinpot
I really think that this is part of the problem.
Of course the NHS has (and has had for a long time) partnerships with 'private' commercial providers, charities, other services such as Social Services etc who have a valid and necessary reason to access patient records, in order to provide care. The Horder Centre in Crowborough is just one of many many examples, the MRI Cenntre at Princess Royal Hospital is another, there are many more examples in Sussex and up and down the country.
However, if I have correctly disentangled the rather anodyne statements on the NHSI website (note the 'I' at the end), this latest initiative is not about sharing my or your medical record so that a partner agency can provide care.
It seems to be a constant uploadfing of data from every GP surgery to a single central database, that others can access. The issue is with the vague definition of 'other', and the uses that the data can be put to, and the ease with which that data can be 'de-anonymised'.
This is a separate issue to the entirely proper sharing of patient data in order to carry out an operation, assist recovery etc that you seem to be referring to.
I think - as I say, the lack of transparency is what is causing the confusion, in my view.
I wholly agree with everything in your very balanced and measured post. You rightly question presence and integrity of the controls that are/are not in place to protect the public.
The OP has so far only managed to sound like a tin hat wearing conspiracy theorist.