Basil Jet wrote:

They've figured out that all this new track they've been planning since
the 1980s and have almost finished building won't actually work.

http://www.southernrailway.com/your-...-consultation/

Discussion at
http://www.londonreconnections.com/2...via-greenwich/

Well, they've realised that the currently planned high frequency timetable
is slightly too ambitious, not that the new track won't work.