Husky One, I'm pretty sure when BMI Regional was bought from British Airways that the owned aircraft were sold and leased back to the owners, now morphed in AIL, in exchange for a cash injection. So the emb jets are owned, but probably not an asset of flyBMI. So its in AIL's interest to place those aircraft with Loganair so they're still earning their keep.
Also Loganair I beleive have been saying that the emb145s are cheaper to run when maintenance is factored in, than the Saab 2000s. If the flyBMI crew take up Loganair's offer of employment then they could back up and running quickly.
The Loganair thread noted that Loganair were paying for flyBMI's HR dept to continue the training records service allowing ex staff to get their records to another employer, which would help that transfer of staff.