My passport is starting to get quite full, but is still valid for several years. Later this year I expect to have to cross the Schengen / Andorra border several times. I know Andorra doesn't stamp passports, but does the EU stamp passports when leaving and entering the Schengen Area to and from Andorra? I'm guessing not, but it would be good know more certainly as it will affect when I need to renew my passport. I will be travelling using a UK passport.
(While this is arguably a duplicate of this question, none of the answers there address the question of Schengen stamps – just Andorran ones.)