Tom,
There is a gal named Debbie who gives "guided" tours. We never used her, but she is highly recommended . If you are looking for a more personal type of tour then you might email her too. ( P.S. she is an American ).
This is an email I saved in my Barcelona file .
Hope the email is still correct -if not let me know and can get it.
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Barcelona Spain Tours
We had a great private tour guide in Barcelona. She is an American woman named Debbie who has lived there for some time, and she helped make our experience in Barcelona a great one. Debbie knows much about the history, culture and people of Barcelona and she was also a lot of fun to be with. We saw in one day with her what would have taken us 3 days to see on our own. She was also helpful with recommendations for good restaurants and stores with the best deals. For lunch, she took us to a wonderful tapas bar. She also gives tours to sights outside of the city, such as Montserrat and other places. You can contact Debbie at debiness@aol.com.