Hmm
Intuitively this is a good idea, but how beneficial is this in reality? NPfIT was a right expensive dogs dinner and if I recall the need to call up remote patient data was relatively rare...
From an information security perspective, aggregation of odd bits of lowly classified information to form a highly informative whole is a right headache that at least the GDPR has tried to address in some form. But including a population-wide centralised database of whole life history, surely that would be heading up to secret classification in aggregation?