Flypuppy,
When I took my Radio Aids resit, there was a question on Decca, which had been taken out of the syllabus (old national exams). I phoned Bristol Ground School, who said to complain; I did and so did several others; we were asked to put it in writing; I don't know what happened but Alex at Bristol seemd to think we'd be credited with it. Then when I failed Principles of Flight by 2 marks, and remembered one question which I was sure had four wrong answers as choices, I e-mailed the CAA and asked about it, and got given two more marks and a pass. If you make a fuss something may get done. If you don't then it won't. But that's life, not just the CAA.