Thanks both. I can't find my fingerprint at the moment but will check. I initially went to the doctor in July as I had two near fainting episodes and episodes of palpitations. I'm now wondering if these were hypos. It was awful. She told me I was prediabetic (HBA1c at 42 with two tests a year apart.) I'd been tested previously with similar issues a year before and also with blurred vision coming and going.. However, I'm on a lowish carb diet now and no longer prediabetic. Not had these symptoms since but vision still changes a lot. Got this libre trial for 2 weeks over Christmas and will see what happens when I eat more carby meals.