Ok, thanks.
I have been driving for forty years. If the law was to be changed so that we all have to drive on the right, I would expect to be informed, having previously been taught the highway code and the need to drive on the left. I would expect anyone used to driving on the left would require some updated training.
I absolutely agree that Trudi Deakin is right to publish updated guidelines for X-Pert courses, but that doesn't mean people who have previously had the conflicting information from earlier courses should be left in ignorance of the new guidelines. Perhaps it should be the responsibility of the GP, or whoever referred them to the original course to ensure the patient is informed of the changes. I don't think it is good enough to just update the course for the future, whilst leaving many previous course participants believing they are eating well.