Although it's been a long time since I've experienced a hypo, Lucozade and biscuits sounds about right to get the BG back to "normal".
Unless you were having to drink Lucozade and eat biscuits several times a day, I don't see that it would affect an HbA1c that much. As for saturated fats hurting total cholesterol, how much are you eating. I don't think anybody can say how much fat has to be consumed to make any significant difference to total cholesterol, LDL or HDL.
You might like to check out the 1963 study "Diet and Plasma Cholesterol in 99 Bank Men" reported in the BMJ. Then there's the 1976 "Tecumseh study", the Evans county study, the Israel Ischemic Heart Disease Study, the Framingham study, the 1978 Bogalusa Heart Study, the 1981 Western Electric study.
I'll not go on. There just seems to be a lot of studies that do not show a connection between saturated fat consumption and cholesterol levels.