His aim is to demonstrate that reduction of visceral fat which is clogging liver and pancreas is effective in causing diabetes remission. It appears to do so. I agree that not reducing carbs has the danger of interfering in BG control and its concommittant harms. So it would seem does the Prof - see
https://www.you.co.uk/professor-roy-taylor-life-without-diabetes-diet/ where he does indicate that diets should be low carb. He doesn't seem set against low carb but takes the pragmatic view that the important thing is to shed the visceral fat by any means which suits the particular person. It does, however, seem silly to me to continue to potentially cause oneself harm from high BG until the fat is lost. Further his idea of low carb, if as high as you state, and my BG levels are at odds. I doubt I could maintain 600-800cals long term and my BG would be sky high on 45% - 53% of a carb laden diet. He recogises that maintaining weight loss is hard but essential so he should be giving clearer advice on hunger limitation. Low carb high protein trumps low calorie high carb in my experience. I had my BG back to normal levels by eating 800 cals at 20g of carbs for 8 weeks. I can manage 1000-1200 in the longer term without overwhelming hunger by limiting carbs to 20g. So I am sticking to his bench mark of back to my youthful jeans but heading to the butcher, fishmonger and the home veggie plot whilst closing my eyes and hurrying past the bakers trying not to breath in the sweet smell of fresh baked bread. Hopefully I can employ the same strategy for maintenance once I can sit down safely in size 10.