Overview
Before you can apply for provisional Category C1 driving licence entitlement, you must pass a Group 2 medical examination using DVLA form D4. This medical is more comprehensive than the standard car licence medical because C1 vehicles are larger and the consequences of a medical episode while driving are more serious. This guide explains exactly what the D4 medical involves and how to prepare.
What Is a Group 2 Medical?
A Group 2 medical is the standard required for drivers of larger vehicles (Category C1, C, D1, D, and their subcategories). It is more stringent than the Group 1 medical required for car drivers. The D4 medical form is used to record the results and is submitted to the DVLA as part of your provisional entitlement application.
What Does the D4 Medical Cover?
| Area Assessed | Standard Required |
|---|---|
| Eyesight | Read a number plate at 20 metres; visual acuity at least 6/7.5 in better eye and 6/60 in worse eye |
| Cardiovascular health | No significant cardiac conditions; blood pressure within acceptable limits |
| Neurological history | No history of epilepsy (or seizure-free for specified period); no recent stroke or TIA |
| Diabetes | Insulin-treated diabetes requires DVLA notification and may require additional assessment |
| Sleep disorders | Obstructive sleep apnoea must be declared and treated before C1 entitlement can be granted |
| Mental health | Significant mental health conditions must be declared; DVLA assesses on a case-by-case basis |
| Alcohol and substance use | Dependency must be declared |
How Much Does the D4 Medical Cost?
The D4 medical typically costs between £80 and £150. It is not covered by the NHS and must be paid by the candidate. Private medical providers and occupational health clinics often offer faster appointments than GPs.
How Long Does DVLA Processing Take?
After completing the D4 medical, you submit form D2 to the DVLA with your current licence and the D4 form. Processing typically takes two to four weeks. You cannot sit the C1 theory test or begin practical training until provisional C1 entitlement appears on your licence.
What If I Have a Medical Condition?
Many medical conditions do not prevent C1 entitlement, but they must be declared. Do not assume a condition will prevent you from obtaining C1 — consult your GP and the DVLA's medical guidance. Failing to declare a relevant condition is a criminal offence and could invalidate your licence and insurance.
Book C1 Training at GS Driver Training
GS Driver Training provides C1 driver training from our Dunsfold Aerodrome training centre, covering Surrey, Hampshire, Berkshire, and the South East. Call 01252 447808 or email [email protected].
