This may be of interest: Managing Conflicts of Interest in the UK National Institute for Health and Care Excellence (NICE) Clinical Guidelines Programme: Qualitative Study https://www.researchgate.net/publication/274194760_Managing_Conflicts_of_Interest_in_the_UK_National_Institute_for_Health_and_Care_Excellence_NICE_Clinical_Guidelines_Programme_Qualitative_Study
Thanks mods for the font size correction - not sure why it was that size in the first place. Maybe I used cut & paste??
I suspect that this is the problem. Lots of these sorts of bodies can have a policy on COIs that is more effective at letting them act as if they've addressed problems with COIs than actually mitigating the bias the results from problems with COIs.
In reality it doesn't matter what the conflict is it won't prevent you from being in the guideline group. They only do conflicts of interest after choosing the members. The MS NICE guidelines have minutes up - conflicts get declared at the start of meetings and that's it. Looks like nobody steps out of the group when they are discussing a good they have a major conflict with. Also some "research expert" chosen by NICE delivers a presentation on a topic at the meetings. Although, as we know, they only read the abstracts to decide what research to include.
it's under the MS guidelines, history, scroll right to the bottom for very brief minutes for each meeting https://www.nice.org.uk/guidance/cg186/history