[RBS] Kosher products in airports in Madrid, Barcelona?

[Goldstein]

Got a couple of flights over the next week with long stopovers in Spain's
airports.
Does anyone have experience of what/where within those airports it is
possible to purchase kosher food?

(And yes, I'm also writing to the Rabbinic authorities in those cities, but
sometimes accurate, knowledgable info is faster coming from this list...)
Thanks.

Avram Goldstein