For me it's usually just the Hba1c test (fingers crossed). I'm not officially diagnosed as I didn't have 2 tests, covid lockdowns intervened and by the time a second test was done I'd gone low carb and was back below the line so NHS computer refuses to show me as diagnosed. Luckily someone at the practice managed to get me on the list for annual Hba1c, and I'm not sure how long that will last.
This forum, and the links people post, mean I'm quite happy managing my own levels. I just like the official confirmation occasionally. Hoping this one I good as I've been quite bad food wise...