Sure it wasn’t just a flying pig wozza? hehehehe oh my that was bad.
I can’t see any reason why the RJ would need to overtake as such, Barons are hardly slouches in the air!
As for airline ops I’m not sure, but overtaking can be done, if my memory of air law is right (and I hope it is, im trying to learn the stuff) as long as its done on the right hand side ;). However thats just PPL stuff I’m looking at.