The DVLA (Driver and Vehicle Licensing Agency) requires all drivers to monitor their glucose levels.
In February 2019, the DVLA updated their regulations to include Group 1 drivers to use Flash Glucose Monitoring systems for the purposes of driving. Drivers must not actively use their glucose monitoring system whilst driving a vehicle, instead they must pull over in a safe location before checking their device. Drivers using the FreeStyle Libre Flash Glucose Monitoring system must get a confirmatory finger prick glucose level in the following circumstances:
If their glucose level is 4.0mmol/L or below.
If they have symptoms of hypoglycaemia.
If their glucose monitoring system gives a reading that is not consistent with their symptoms.
If they are aware that they have become hypoglycaemic or have indication of impending hypoglycaemia.
During times of rapidly changing glucose levels Group 2 drivers must continue to use finger prick testing for the purposes of driving. Flash Glucose Monitoring systems are not legally permitted for the purposes of Group 2 drivers.
For the most up to date requirements you can visit https://www.gov.uk/guidance/diabetes-mellitus-assessing-fitness-to-drive.