How about IB taking over both BCN and MAD flights? Schedulewise that would be perfect as IB could do both rotations with one crew and plane with schedules fitting into AY's Asia flights (afternoon turn in HEL). Servicewise IB's service is almost as bad/good as AY's nowadays and I'm sure the IB can do it cheaper than AY. As a bonus, flights would still be operated with well known global carrier instead of some third class ad-hoc chater airline which most passengers have never heard of.