I would think a Level D sim is only required for the type rating at the end. The earlier bits could be done in an FNPT II so long as it is one based on a multi-crew aircraft. That leaves quite a few players able to do all but the TR in house, but maybe FlyBe will subcontract parts to different players. I think the only one they currently have a programme with that has Level D Q400s for the type rating is OAA in Stockholm, but they could just deliver the TR as they do now.