<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by SFOJFK:
IIRC, the BA Spain flights are IB codeshares. </font>
On this topic, BA both flies its own metal and codeshares with IB. For LHR-BCN, BA has at least 4 flights on its own metal along with 2 codeshares. By the same token, Iberia codeshares on the BA-operated flights as well.