Dstock7080
Established Member
Not sure if this is any help, released today:
https://consultations.tfl.gov.uk/london-overground/gobe/user_uploads/future-london-overground-map-k-.pdf-3
https://consultations.tfl.gov.uk/london-overground/gobe/user_uploads/future-london-overground-map-k-.pdf-3