The data is out there, it just so happens it’s spread about everywhere and very difficult to find. I’ll try and keep this list of useful resources.
Lots of metrics by country, mostly health related but also some development indicies. Downloadable in csv, excel, html, json, and xml. There is also an API.
Collection of indicators on health and social care. Mostly just England. Downloadable in csv and excel formats.
Data and demographics on CCGs and practices in England. Online interactive visualisation and downloads in excel format.
Reference documentation for various NHS related things. Not human readable. Requires accepting licenses and download formats vary by package.
Demographic indicators, many of which stretch back to 1950.
Data from the World Bank, some dating back to 1960. Availiable as a bulk download in csv and excel formats.
Interactive portal to GP prescribing data. There is also a very handy REST API.