SELECT station FROM table_name_73 WHERE zone_2008 = "8" AND zone_2007 = "outside zones" AND services = "london overground"
Stasiun mana yang memiliki zona 2008 dari 8, dan zona zona luar 2007, dan layanan London Overground?
CREATE TABLE table_name_73 (station VARCHAR, services VARCHAR, zone_2008 VARCHAR, zone_2007 VARCHAR)