Think it is a rendez vous point which is virtually the same as a bubble trip. It is just the escort to shitsville starts at the rendez vous point rather than at CCS.
It will be interesting to see where they put the rendez vous point as if it is anywhere near as west as say Port Talbot for example I can see trouble in the places that cross over (PT, Neath etc). Of course the RV point will be common knowledge as it will be on the vouchers that need swapping etc.