I completed a survey, perhaps last year which was about standards in public life and the code. They obvisously didn't get too many responses because they were keen for mine to be included (I made some sort of error or they asked for clarification). Anyways, I thought the code, if followed to the letter was very good but pointed out that Lobbying was an issue and not just big business but also charities, especially if the had a political, or controversial remit. Don't know what the outcome was.
As an aside, sometimes public bodies are withdrawing from SW but then recruiting an equally divisive organisation in their place, or using some subterfuge. On the subterfuge I think it was CPS who withdrew but then transferred their diversity work to another government office who hadn't withdrawn from SW. Can't find the thread where the alternative organisation was used. Someone might remember