Moderator, Iberia Airlines, Airport Lounges, and Ambassador, British Airways Executive Club
Join Date: Feb 2010
Programs: BA Lifetime Gold; Flying Blue Life Platinum; LH Sen.; Hilton Diamond; Kemal Kebabs Prized Customer
Posts: 63,837
I would suspect that this is BA's codeshare onto Iberia. As per the network thread, BA appears to have reduced its MAD's frequency in favour of Iberia adding flights to their roster.