Have they done any due diligence?
The NHS is dying through underfunding, Brexit-originated loss of staff, Brexit-originated inflation and strikes. People cannot easily obtain healthcare and consider a trip to hospital to come with a free dose of Covid.
Lots of us are never going to use the apps or video appointments. Anyone who can afford it pays for private healthcare due to the waiting lists. NHS services are being centralised as there are so few staff and so little money, and people just can't get to them.
There are 7.5 million on the waiting lists getting sicker. And much of the software creating the data could do with some treatment too. Was it 24,000 patient letters that didn't get sent out because they were stored in a folder nobody knew about? How accessible is all that data? People are relying on anything they can get from Boots OTC. Painkillers especially. Post-Brexit, we now live with illness rather than fixing it. G7 in name only. First world in name only.
Like most things in Brexit Britain, the NHS is collapsing, winding down, falling apart - pick your term of choice. And it is going to get worse, not better. Would you buy used data from a service like that? Is it reliable? Is it relevant to a fully functioning healthcare service? Big data is not all equal. It's value lies in its relevance.