Both Saab's currently on lease from T3 are operating the IOM and DUS daily services and some additional to ANE and EGC through until September when the one operating to DUS will be replaced by a E-jet freeing it up to operate the HAM service.
I would have thought an agreement to lease another S2000 from T3 would have been organised before the route was announced. Mind you were BACF not expecting to have E-jet enter service in June and another in September. Maybe the delayed entry into service is the reason for the aircraft changes.