Interesting Stuart;are you via Brussels saying that all UK registered and plated cars running around Spain are actually legal (assuming they are actually deemed road worthy) and could therefore be insured either in/from spain or the UK.This 90 days / 6 month outside the UK ruling would therefore be pointless and the need to matriculate would not exsist,after all,the EU is supposed to be one big happy family all singing from the same song book......
I`d like to see this in writing if it is the case