Extract from the latest DVLA guidance to drivers ON INSULIN who need to inform DVLA and undergo assessment for fitness to drive
<<at the examination, the consultant will need to see the preceding three months continuous blood sugar/glucose readings available on a blood sugar/glucose meter with memory function and covering a three month period during which you were on insulin>>
This was a recent update (10 Aug 2016) and mainly affects ID Group 2 drivers undergoing annual reassessment, but can apply to others if they need reassessment following a severe hypo event or laser eye treatment, It also can apply after age 70 when re-applying for licences. Someone using a sulphonurea or glinide may be advised to follow this regime too if they have impaired hypo awareness.
Note: a 500 reading memory can store 5.5 tests a day rate, /note these are actual bgl results excluding calibration checks and misreads. HGV and PSV drivers on insulin need to test every 2 hours while driving. Hypo recovery also necessitates a retest upon recovery. So this drives the 1000 memory in the NHS approval protocol