Bearing in mind David Unwin fronts up an RCGP training module, relating to T2 diabetes, his work with PHCUK, his world-wide speaking programme (last year, I seem to recall US, Australia, and of course, many, many UK based events. I know he spoke at our local NHS GP's regular meeting (by local, I mean a couple of cheek-by-jowl CCGs), around this time last year. Unfortunately, I was away, so could not attend.
He has come up in conversation at the NIHR, where I am involved, which happens to be attached to a highly regarded Diabetes Centre, the staff of which include allegedly 2 of the top 10 diabetes specialists in the world.
https://diabetestimes.co.uk/two-lei...0-list-of-worlds-leading-diabetes-clinicians/ OK, a late 2018 article, so not absolutely current.
I'm not sure what else you expect a semi-retired GP to do for his patients and those living with diabetes (his expertise is T2, to be fair) as a whole. I think he's doing one heck of a lot already.
I think the man is a miracle worker, and having had the opportunity to meet and talk with him several times, I would say a genuinely interesting and interested man, who really does care for others.
We could do a lot worse than to have many more just like him.