When BALPA & IALPA attempted to cooperate to achieve union recognition in Ryanair, BALPA was the "sleepy" partner of the two , and due to inertia and dithering on their part , the best opportunity for recognition went to waste. Despite IALPA's exortations to "get the finger out" they wouldn't take the bull by the horns.
Given BA and Iberia both have recognition this won't be a problem. The (I assume) reasonably militant Spanish Prince should take care who he gets into bed with, she ain't no nymphomaniac, fairly frigid in fact from what I have seen