Nice example to demonstrate how dependent LCY operations are on a very small number of LCY-capable aircraft and a few airlines with an ACMI-style of operation when it comes to third-party operations.
To the best of my knowledge, there is not a single RJ85 available on the market and only two or three ex THY RJ100 (which, IIRC, are not in the best shape). And while Star Alliance or Skyteam have a number of airlines under their umbrella with sizeable fleets of Avro RJs / BAe 146 that can be shifted if urgently needed, oneworld has nothing comparable at its disposal. Will be interesting to see how BACF will cope.