Hi and welcome.
All the meters sold in the UK are required to be accurate to within 15%
That means that if your actual blood glucose were 10mmol/l, then the reader is allowed to give a reading between 8.5 and 11.5 mmol/l
So expecting total accuracy is not a realistic goal, I am afraid.
Having said that, because of this, most of us choose to buy cheap meters when we pay for them ourselves - since they are all approximately the same accuracy!
The one I use, and many other T2s around here, is the SD Codefree. It is available from Amazon, eBay and the manufacturers, Homehealth, and it works out at around half the price for 50 test strips of most other meters. Bargain, eh?