I think a mate may have done Tony. Is it Comizo (speling?) country? I think he also had a different species of barbel from there, a distinctly two toned (yellow underneath) fish. I'll get back to you.
Yes Comizo Sash, and others, thanks. The black and yellow ones are your Andalucian barbel and I didnt think they went that far north. The Tajo runs just below Madrid ish and into Portugal.