Welcome to the forum John
Congratulations for wanting to be proactive and taking responsibility for your own health
Your HbA1c has only just tipped over into the T2 range, it shouldn't be too difficult to get it back down to pre D levels or even lower. We have many members who have managed to do just that from a much higher starting point.
The Newcastle diet was popular quite a few years ago and was successful for some but by no means all.
Here's an old thread about the ND you might find useful
https://www.diabetes.co.uk/forum/threads/newcastle-diet-survivors-where-are-they-now.56235/
The problem we have as T2's is that our insulin is no longer as effective as it should be. We have trouble dealing with the glucose that comes from the carbohydrates in our diets. So reducing the amount of carbs will reduce your sugar levels. In my opinion much preferable to a starvation diet that may or may not work.
While weight loss is of course a worthwhile goal, it's not necessarily going to mean you can " beat this"
Some 10% of T2's are underweight and can't afford to lose more and the vast majority of overweight people do not have T2 diabetes. So clearly there are other factors at play, it's not just about the weight no matter what you read in our wonderful newspapers
Have a look at the nutritional thingy, the link is at the bottom of my post.
Here's a few other links that should help
https://lowcarbfreshwell.co.uk/
https://www.ditchthecarbs.com/howtostart/
https://www.dietdoctor.com/low-carb