New rules were issued in 2011 which allow diabetics on insulin to hold a DVLA group 2 licence. However, there are quite strict requirements. You need to get a statement every year from a diabetes consultant to say that you are taking care of your diabetes and are checking your blood sugar levels at least twice a day, and that you use a machine which remembers the last three months’ measurements. There are some other requirements including understanding about diabetes and signing a declaration yourself.