Thankyou for your response.
Yes we do use different measurements here. We use mmol/L (whatever that means). The blood test I took for the doctor was a 'fasting glucose' test where I didn't eat anything before 10pm at night and the test was taken the next day.
It helps me to know that I only need to know an average. I thought that it was something that I needed to check almost like the ketone strips as a guideline as to whether my body was burning fat or not.
I'm very encouraged at the moment because in the last few days my weight has begun to drop and I've lost about 2cm around my waist... so I am doing something right!