Hi kinny, Since you say you have high Cholesterol I suspect that you kept eating lots of so-called healthy Carbs while trying to lose weight.
If that is the case then it is no surprise that your HbA1C is slightly worse even though you have lost 1 stone.
I'm afraid that the way most of us control T2 Diabetes is by a Low Carb High(er) Fat 'Way Of Eating' ( not a diet - since no Calorie counting).
An alternative is to reduce Carbs and increase Protein.
It is understandable if you are afraid of Fat since it has been wrongly (in my opinion) blamed for Heart disease and even for Type 2 Diabetes. But there is plenty of evidence that Low Carb puts T2D into remission in around 50% of those who try it, plus they lose weight provided they go higher Fat instead of cutting their total Calories.
There is plenty of evidence that dietary Fat (even Saturated Fat) doesn't increase LDL Cholesterol (in most people) and is known to increase HDL cholesterol.
Here is a recent (October 2019) study in PubMed saying that a 10gm increase in dietary Saturated Fat reduces the (relative) risk of Stroke by 6%.
https://pubmed.ncbi.nlm.nih.gov/317...-of-prospective-cohort-studies/?dopt=Abstract
Personally, since my T2D diagnosis I eat fatty meat, fatty fish, eggs, cheese, full fat dairy, avocado , nuts etc. despite being on a high carb way of eating for over 10 yrs.
I started on High Carb 6yrs before I needed a 3x Coronary Bypass, getting a T2 D diagnosis less than 3 yrs later was just too much for me to continue to believe in the dietary advice of my GP.