If you have one of the photocard-type driving licences you will have to renew it every ten years. Recently I had to update my photograph as I no longer resemble the fresh-faced fellow pictured. You can supply your own photograph and do it by post or you can go to a main Post Office and do it there.
I chose the second option and have to say that I was impressed by the helpful service from the staff at the main
The DVLA attracts a lot of criticism for losing post, long delays and a general level of un-helpfulness. The Post Office is famed for queues and not being somewhere you want to go (to be fair there was a monster queue forming as I left the branch). It is nice, however, to be able to report positive experiences of both organisations.