Don
Well played for using the search 
DVLA Advice - Need to change address + Renew photo!
- Thread starter Malt_Vinegar
- Start date
I done both online - it used my passport photo to replace my expired license photo and i'm sure it just asked me a few details to confirm my new address as well as wanting details from the paper and card part of the license. Only took half an hour and the new card etc were out within a week - it just asked that I destroy the old copy.
Glad my ineptitude could be of service! 