Spain car hire licence reqmts

[battered]

I'm going to Spain for a week on hols. I've heard something about a code that may be required, now that the paper part of the licence is no longer issued. I have an old green paper one (yes, I am that old) with no photocard. I've never had a problem in the past, just show PP and green licence, sign, keys, done. Do I now need to contact DVLA and get a code that I can give to the hire shop?