Posted: Thu Jul 15, 2021 2:11pm
All the information on this subject can be found on the Citizens Advice Bureau Spain's website and on their Facebook group. It's a closed group and you will need to apply to become a member.
https://www.citizensadvice.org.es/
https://www.facebook.com/groups/171561296334693
If you were living in Spain before 31-12-20 and made an application or officially registered your intent to exchange your driving licence for a Spanish one before that date, then you could still qualify to do this but if you have only realised this now, then you will have to obtain a Spanish driving licence in the usual way and take the Spanish driving test.
The information regarding the exchange of driving licences has been well publicised in the press and the various "Stop-Brexit" campaigns for the past 5 years or so, as well as those informing British citizens wishing to become a legal resident in Spain, that they have to apply for residency or if already living in Spain without the required paperwork, that they had until 31-12-20 to regularise their situation.