TUPE is not considered to "go both ways". However, employment law would protect the current BA staff. A 90 day consultation period would be required before transfer takes place. As "look you" has pointed out it's not actually stipulated in law, but, the law is similar to redundancy law (which requires 90 days consultation). Either way I think we know where our money is on?
The most important point is that it looks like BMI Baby/regional are in the sights of prospective buyers as well. One thing is for sure change would have to had happened within BMI this year to make a turn around.