I've had a chance to look at this in a bit more detail and will be writing to the Mayor, our MP and Councillors. In danger of sounding like a typical angry commuter...but I may have to accept that's what I am!
Basically, TfL and Southern have used the disruption in London Bridge to cut services to Forest Hill, Sydenham, Honor Oak Park, Brockley and New Cross Gate. Used to be 6 trains an hour to London Bridge in peak times, now it will be four, and half of these will be cancelled frequently (the Victoria loop line is often cancelled when running late).
I did a bit of hunting for passenger stats and found 2013-14 here (relevant because after this it was affected by London Bridge cuts). I've attached some screenshots from the data sorted by passenger entries+exits - I couldn't see passenger impact in the consultation but I suspect they are using flawed figures from the period when London Bridge services, including the interchange for Waterloo East/Charing Cross, had been reduced. This would have forced many people to use other stations (as I did myself).
I would argue the London Bridge via Forest Hill service should be increased rather than reduced because:
- the interchange at Canada Water is already overcrowded, as are Overground trains, and cuts will force more passengers to change at Canada Water
- the alternative Overground trains are woefully inadequate, being 5 carriages instead of 10, and Canada Water was only designed for 4 carriage trains so rear doors don't work.
- Forest Hill in particular is one of the busiest commuter stations in London, busier than West Croydon or Norwood Junction. When mainline stations and interchanges are excluded it is near the top, with Brockley not far behind.
- more than 14 million passengers a year use the Forest Hill/London Bridge line from Sydenham, Forest Hill, HOP and Brockley.
Hopefully my workings will attach...I sorted London's stations by entries/exits. Very happy for others to use this if they write/post elsewhere! (And for someone better with stats to improve them!!)