Drivers with diabetes on insulin or other medication

If you don’t tell DVA about a medical condition

It is an offence if you do not tell the DVA about a medical condition that may impact your ability to drive and is punishable, on conviction, of a fine of up to £1,000.

It is also an offence to drive after making a false declaration about your health to the DVA and is punishable, on conviction, of a fine of up to £2,500.

Interstitial Fluid Glucose Monitoring Systems

These devices are more widely known as flash glucose monitoring systems (Flash GM) and real-time continuous glucose monitoring systems (RT-CGM), or continuous glucose monitoring (CGM) systems.  

From 1 August 2026, drivers may use devices that are medically approved for making treatment decisions based on CGM readings, and are capable of storing at least four weeks’ worth of glucose readings. 

Users of CGM systems must carry a finger prick blood glucose meter with a memory function as a backup, in case the CGM system stops working or gives readings that do not match how the user feels (for example, symptoms of hypoglycaemia but no low glucose reading shown)

Applying for or renewing vocational entitlements

Stage one – application forms

The licence application process cannot start until your condition has been stable for at least one month and you can provide at least four weeks of glucose readings taken while on insulin. 

• renew your bus or lorry licence
• or, request application form DL2 and a DIAB1 (VOC) medical questionnaire from Driver & Vehicle Agency (DVA) customer services by telephoning 0300 200 7861
• complete the online renewal or paper form and return these to DVA for assessment before moving onto stage two

Stage two – your own doctor's medical questionnaire

• if you are cleared to move on to stage two, you will be issued with form DIAB2 (VOC) medical questionnaire
• you should have this form completed by your own GP or your diabetes consultant (whoever manages your condition)
• DVA will pay the fee charged for this questionnaire, up to a maximum of £40
• if required, you may also be issued with a DLM1 Medical Examination Report which must be completed by your own doctor*
• you are responsible for any fees that may be charged for completing the DLM1 form

* Read the ‘Further guidance’ section below for information on whether a DLM1 form is required.

Stage three (insulin treatment) – specialist medical questionnaire and examination

This stage only applies to those treated with insulin.

• an independent hospital consultant who specialises in the treatment of diabetes will be nominated by DVA - the consultant will complete an Annual Diabetes Examination report based on an examination and assessment of you
• at the examination, the consultant will need to see the preceding four weeks continuous glucose readings available on a glucose meter with memory function and covering a four-week period during which you were on insulin
• DVA will pay the fee for this examination

Qualifying conditions 

Qualifying conditions you must meet before your application is considered:

• you have had no hypoglycaemic event requiring the help of another person in the last 12 months
• you must have full awareness of the symptoms of hypoglycaemia
• you must be able to show an understanding of the risks of hypoglycaemia
• you must monitor your glucose levels at times relevant to driving
• you must keep a fast-acting carbohydrate in your vehicle at all times when driving
• you must carry a finger prick blood glucose meter with a memory function as a backup
• you must have no other medical condition which would make you a danger when driving using any vocational entitlement
• you will be required to sign an agreement to keep to the directions of doctors treating your diabetes and immediately report any significant change to your condition to DVA

Additional conditions for people treated with insulin

• you must do glucose monitoring using a glucose meter with a memory function to measure and record glucose levels
• you will be required to go to an examination every 12 months with a consultant specialising in the treatment of diabetes - you must have at least four weeks of a continuous set of glucose readings available on the memory of your meter for the consultant to inspect
• you should have been on insulin during this period, and the readings are for the four-week period preceding the date of the assessment

Further guidance

• on your first application for Group two entitlement, you must complete form DLM1
• a DLM1 will be required every five years until the age of 65 - from age 65 a DLM1 will be required every 12 months
• do not send in an application if you cannot meet the qualifying conditions or if you have any other condition which would prevent you from holding a vocational licence category
• if you are required to undergo annual medical examination and the report issued by the independent diabetes specialist indicates that you meet the required medical standards, your Group two licence may only be issued for a period of one year, with renewal of the licence depending on further medical examination

More useful links

• How to surrender your driving licence and return to driving at a later date
• At a glance guide to the current standards of fitness to drive - GOV.UK website