I think I've come to the end of my current efforts at the ND - I lost 2lbs this week - making a total weightloss of 1st 7lbs (or 21lbs or 9.52 kgs) and I've lost 4 inches ( 10cm) off my waist measurement and I've dropped nearly two dress sizes. My BGs are slightly lower than they were at the start but not by much - they went very low in the first 10 days then (as is usual with me) my body adjusted and my fasting blood glucose has reverted back to its old numbers.
I should, maybe, continue longer but I am slowly losing the will to live after 10 weeks of such a low calorie intake and not much to show for it in my BGs.
I'm having a couple of weeks of just normal low carb with healthy fats then I think I'm going to try a two weeks on / two weeks off diet approach as recommended by Jason Fung in his recent post here (towards the bottom when he mentions the MATADOR study) - >
https://idmprogram.com/eat-fast-break-fast/