UK driving licences must be renewed every ten years and when the driver reaches the age of 70. Thereafter, it must be renewed every three years. When renewing, you have the chance to change the photo on your licence to a more recent one.
Before learning to drive, a provisional licence must be applied for and received. This is an essential requirement for having lessons. When the instructor judges that you are ready, the theory test is taken at a local centre. If you pass that, you can then book the driving test and if successful, the full licence is issued.
Some people do not pass these tests the first time, but they can always book again…
(Image: Phil Champion at geograph.org.uk / CC BY-SA 2.0)