So it looks like we get a repeat of the BA drama. Maybe the IB unions should have learned from that, but militant unions seem to live in their own world, and reason and common sense are in very short supply. It always surprises me that people think they will get into a better situation by pissing off the people who in the end pay their salary (the customers).
I've booked a refundable backup flight on the 19th in case the strikes go through, I'm not giving them the chance to ruin my holiday. If I need to use it I won't be flying iberia again, that's for sure.