In case anyone's interested, I came across this the other day.
http://www.google.co.uk/url?sa=t&rct=j&q=squarrers%20in%20empty%20spanish%20property&source=web&cd=1&cad=rja&uact=8&ved=0CC0QFjAA&url=http%3A%2F%2Fwww.spanishpropertyinsight.com%2Flegal%2Fsquatters-in-spain%2F&ei=c3AsU8P1BNTwhQfVqIDoAQ&usg=AFQjCNEWut4-h6HvzeRjHs9WkkZ5f5R2TA&sig2=6-K3Ue6sB9EjoetIWcHjNg&bvm=bv.62922401,d.bGQ (http://www.google.co.uk/url?sa=t&rct=j&q=squarrers%20in%20empty%20spanish%20property&source=web&cd=1&cad=rja&uact=8&ved=0CC0QFjAA&url=http%3A%2F%2Fwww.spanishpropertyinsight.com%2Flegal%2Fsquatters-in-spain%2F&ei=c3AsU8P1BNTwhQfVqIDoAQ&usg=AFQjCNEWut4-h6HvzeRjHs9WkkZ5f5R2TA&sig2=6-K3Ue6sB9EjoetIWcHjNg&bvm=bv.62922401,d.bGQ)