You must take a form of identity to the examination, for example your passport, driving licence or utility bill.
If you wear glasses you should take your current prescription clearly showing your dioptre measurements.
It is also good practice to bring along your GP records in the form of a computer summary printout (usually 2 pages) from your GP.
You should fill in sections 11 and 12 on page 8 of the medical assessment when you are with the doctor carrying out the medical examination.
When do you need a D4?
If this is your first application for a Group 2 licence. This includes small and medium sized lorries, full sized lorries, buses and minibuses.
If you are applying to renew your Group 2 entitlement at age 45. From age 45 onwards, a D4 will be needed every 5 years until you are age 65, when it will be needed every year.
If you are under 70 years of age, hold a medically restricted car licence and have held this licence since before 1 January 1997 and wish to apply for C1 or C1/D1 entitlement (vehicles between 3500kg and 7500kg and/or a maximum of 16 passenger seats).
If you are applying for a new Group 2 provisional entitlement and a D4 has not been submitted in the last 12 months.
If you are an EU/EEA driving licence holder whose authority to drive Group 2 in Great Britain has run out.
If you are age 70 and still need your C1 and D1 entitlement. You will need to send in a D4 every 3 years.