Thank you Diabell, nosher and daisy. It seems that eating fruit which I do each day could be a contributing factor.
I shall re-examine my carb intake and seek where it takes me,
Due to economic constraint (presumably) my surgery has stopped supplies for my blood sugar monitor. My doctor saw the irony as my then latest blood test (3 monthly) showed a rise to 69. He wanted to put me on Gliclazide. I'm already on 2000 Metformin, 100 Sitagliptin. I resisted as it causes...