Firstly for those who tell me that announced apologies are actually welcomed and deemed sincere, I'm grateful. I did think that the passengers would all be giving the speakers daggers when I apologise for the 400th time that day.
Secondly I believe the Tattenhams and Horshams will be going through the core all day, boosting capacity on these routes (esp for East Croydon, Purley, Redhill, Gatwick etc) and freeing up capacity on the terminating platforms, for hopefully, a better frequency via South Bermondsey, Peckham Rye etc. Caterhams, Grinsteads etc are peak only and will go through the core instead of terminating which frees up valuable peak terminating capacity.
Thirdly, as for route knowledge, no-one SEEMS to know exactly who will be doing what in 2018 when the TSGN is one company with a completed network. Unless someone on here knows different...?