UK and Spannish national ATPL’s are no longer been offered. They have been replaced by the JAR-ATPL.
You will find they are the same in terms of learning objectives as well as sharing the same question bank.
You can study for a UK issued JAR ATPL in Spain; I would guess that if you were shooting for UK operators a UK issue Frozen ATPL would be of slight advantage.
But then again the Spanish market can also be good at times…
