Then, if there’s a pilot strike, the airline which has initially covered his or her training, can call upon the pilot to fill in the empty seat on a temporary or permanent basis."
I'm at a loss to understand the logic of this. Firstly, if the substitute pilots are 'called up' they will then leave their host airline in the lurch. That in itself would waken up the legal boys. Then there are the type rating courses required, even OCC's for type rated guys. They are not instantaneous and would require strike breaking instructors to help out. And then, just how long is this strike? It will take many weeks to 'replace' the regulars with substitutes, by which time the host airline is bust after a 2 month strike.
What a curious concept. And I thought BAA was based in Lithuania which is EU.