Re: "Mandate"? That'll be £1 in the swear box
The problem is you are assuming there still is a singular NHS.
The 2012 Health and Social Care Act broke the organisation into 2,500+ bite-sized organisations that the new government could sell off.
This caused the number of administrators and non-medical staff to skyrocket, and costs to go through the roof.
This is why we now have an NHS in the state it is in.
The only way to get it working again is to undo the damage and put the NHS back together.
The NPfIT failed as it tried to design a single system that worked for everyone, which was an impossible task.
The way to make a Single Care record is to define the record standard and allow any system that implements that standard to connect to the central record.