Very diappointing

BA needs to ensure all their airline partners abide by the law and provide high quality services. I’ve booked a flight from BA. It turned out Iberia was operating it. Unfortunately Iberia refused TWICE to allocate me aisle seats free of charge due to medical reasons, justified by an official document. Instead, they contravened Regulation EC 1107/2006 by demanding that I pay for such a simple request. Breaching the law to commercialise passengers’ health issues is completely unacceptable. Open your eyes, BA: you hold responsibility for all flights booked through you, regardless of which other airline is operating them! Please be more rigorous in supervising service quality amongst your partners.