Miss M
Pilots won't be worried if BA aircraft are registered in Spain, France, Italy or wherever. As I'm sure you know, under JAR, (and EASA from 2012). a pilot licenced to fly an aircraft in the UK can fly one registered in any other european country.
Despite the desperate hopes from some on CF (XX still?) there will be no cruise pilots, no Mixed fleet for pilots etc, those being recruited for next year will enjoy exactly the same Ts and Cs and Bidline benefits that current pilots enjoy.
That's what happens when a union engages with the company.