I've started tested my bloods again after a couple of years of ignorance, and it hasn't been pleasant reading. Numbers are typically around 14mmol/l despite cutting out carbs. Lowest I've seen is 10.8mmol/l. Worst thing is my symptoms have cleared up which suggests I've been running even higher, so my A1C is sure to be a treat!
I've taken the decision to fast completely for a few days, on black coffee & water. Hopefully this should allow me to burn off a bit of sugar and get my numbers down.