This is very interesting (disclaimer: I work for the NHS, although this isn't within the remit of my role). Many useful comments in the thread, so I'll add just one thing. In NHS England there are national programmes for screening that set the guidelines and, up to a point, the process under which screening for a specific condition or set of conditions happens. Some of these are under review, and looking at how they work might be a good starting point for a discussion of something like this: https://www.england.nhs.uk/cancer/early-diagnosis/screening-....