There were no flexi crew in Madrid, it is only in the UK and Germany now due to the various unions.
As for the dreams of the schools.. yes, it's stupid to think BA is going to want you, but don't forget that only a few years ago BA DID go down to the school and recruit people directly for the finished crop, as they had done for a number of years.
Sadly, the said schools still sell the product on this basis, even though its ancient history in aviation terms.