Airbus bases

[apollon]

Dear friends
I was wandering if there are any Airbus bases in Europe for F/O's
and what kind of schedules do they get?
Also is there any difference in quality of schedules between the
Airbus fleet and the 747 fleet?

Thanx

[apollon]

Do you hapen to know how many years seniority are required to
hold one of this European A-340 bases as an F/O?

Thanx