Safe diabetic blood count UK?

From Diabetics.co.uk:

*The non-diabetic figures are provided for information but are not part of NICE guidelines.

Normal and diabetic blood sugar ranges
For the majority of healthy individuals, normal blood sugar levels are as follows:

Between 4.0 to 5.4 mmol/L (72 to 99 mg/dL) when fasting [361]
Up to 7.8 mmol/L (140 mg/dL) 2 hours after eating
For people with diabetes, blood sugar level targets are as follows:

Before meals : 4 to 7 mmol/L for people with type 1 or type 2 diabetes
After meals : under 9 mmol/L for people with type 1 diabetes and under 8.5mmol/L for people with type 2 diabetes