GeoGraph - photograph every grid square

The North London heavy rail suburban network is now operated by London Overground Rail Operations Ltd as a Transport for London concession rather than as a franchise awarded by the Department for Transport. Although still part of the National Rail system, it is now also integrated with the rest of London's public transport infrastructure, so the TfL roundel appears on station nameboards as here. Note the successive attempts to paint out graffiti from the retaining wall.