This is what Bed Goldacre and others wrote to the General Medical Council in 2013 on the subject of conflict of interest (and also withheld trial results):-
http://www.badscience.net/2013/12/h...-systemic-failures-in-the-medical-profession/
interesting read especially about the GP's conflict of interest. I had been assured that my GP would not be "allowed" to "profit" from participating in a trial and certainly would not fail to advise a patient they are pre diabetic or refuse medication because of their interest in diabetes trials.
Coventry NHS trust are actively investigating clinical trials for the likes of GSK as an income source but openly state they are having problems finding enough patients for a dementia trial.
This article in todays Guardian is a bit of an expose on sensationalist science reporting
https://www.theguardian.com/science...g&utm_term=232424&subid=10401739&CMP=ema-2793. It is about publishing and how scientists improve their job prospects. No specific mention of diabetes.