the Lea valley lines is 24 miles long in total runs from to the areas of east London and north London and the route has 2 tunnels Queens Rd tunnel 437 yards long Clapton tunnel 284 yards long the route is a great route in greater London
Great route part of the transport for London on the London Overground network I know DTG has the license with TFL
I've said this before but if someone makes the West Anglia Main Line, then the Lea Valley Lines could come afterwards, like Chatham Main & Medway Valley lines. Probably too much route to make in one go. Also I don't think DTG has access to the Greater Anglia license (based upon the GEML and Class 90 being released unbranded) so that itself is a hurdle to overcome first.