I wouldn't worry at all about the clinic; it should be fine. Most annual/bi-annual check-ups for diabetes consist of a blood test beforehand to check BS, kidney function etc and at the appointment you will have a blood pressure check, weight check and normally a foot check for pulse and nerve sensation with a tuning fork or whatever. The rest will be a chat and review of medication and any other worries. Ref low carb be aware that the NHS may suggest high levels of starchy carbs. What they really mean is high levels of fibrous carbs which aren't too bad but this gets translated to bread, pasta etc which can be very bad for BS, so go for low-GI carbs where you can and not too many. As others have said a meter is essential whatever the NHS says and you can get one for free from one of the manufacturers and strips off the web.