Thanks for that, really appreciate it. Also explains my rapid early BS rise throughout the morning irrespective of diet as CGM shows me often dropping to 3 mmols or less overnight. (Somogyl Phenomenon) Not really so sure that I will be fasting in future voluntarily as it would seem my liver is fighting against it and I want to keep on good terms with my liver wherever possible as I have possibly abused it a bit over the years.From memory I think its something to do with your body pushing out glucose from your stores of glucose to energise you through a fast. This is probably a good thing. Here is a link https://www.diabetes.co.uk/body/liver-and-blood-glucose-levels.html which explains it better than i can.