I spoke to a streamline crewmember the other week who told me he thought there were 40 plus in the "holding pool" for the r/h seat!
Those cosidering this route may be advised to try and verify this.
You have to impress on your lpc/opc with the trainer, to be even in with a chance too (only right I think), as it is no definite job at the end of it.
As far as BAC goes, their training is a little more thorough, and consiquently takes more time and costs more.