Warrior,
All the previous pilots who have joined on fixed term contracts with the exception of a very few who, following a file review were not invited back, have been offered permanent positions at the end of their term. This is, however, in no way guaranteed, and these positions currently on offer are to crew two aircraft, one at EDI and one at LBA for summer 14. These were originally to be Canadian aircraft from Sunwing, but for various reasons that has not materialised. Provided the issues can be resolved these bases could well be covered by the Canadians in following seasons, thus reducing the requirement for pilots. That is why some of the positions are on the basis you have been offered. Crystal ball required I'm afraid.