British driving licence Spain only valid for 6 months. (Unless applied to swap while EU citizen December 2020) Update Ambassador 31/10/21
Very helpful member
Third non EU countries with which Spain has signed agreements for the exchange of
permits are: Andorra, Algeria, Argentina, Bolivia, Chile, Colombia,
South Korea, Croatia, Ecuador, Japan, Morocco, Peru, Dominican Republic,
Paraguay, Switzerland, Uruguay , Venezuela, Brazil, El Salvador, the
Philippines, Guatemala, Serbia, Turkey, Tunisia and Ukraine.
Last update British Ambassador is hopeful for UK driving licence extension in Spain