Well.
For now JMC Pilots are/were flying some ex Lufthansa 320s with D-registration, after having been trained by CondorBerlin Check CPs to get the German LBA endorsement on their UK ATPL... while having CondorBerlin FAs in the back.
All-CondorBerlin planes and crews are also currently filling the CityBird void.
Thomas Cook has some creative management...