Bizarrely I was going to ask about this yesterday!
I heard about this last year, though I was under the impression that it was supposed to broadcast late
this year, which obviously hasn't happened. Maybe I was wrongly informed or broadcast was pushed back to 2013. Anyway, the details from last year were:
-That it is/was supposed to be a 6 part documentary.
-The focus is on NR, though would cover 'partner agencies' too, including BTP.
-It was a NR 'managed' project.
-Fillming was due to start in Autumn 2011 and last 6 months, so basically fitting in with your bulletin.
-As Wessex points out, made by Century films.
-What I saw gave the impression that it was going to be covering all sorts of places, not just the South.
Should be good whenever it turns up. I imagine it'll be a mix of The Tube, Rail Cops and that one off
late 80's BR documentary that used to be on You Tube, the one that followed what was the equivalent of a MOM dealing with various issues on NSE. It started with him attending some over running engineering works (and showed TCS/Control response), he went out to a signal failure and attended a fatality. Annoyingly I can't find it now so can only post that vague description!