London Overground (LO)

London Overground (LO) is an urban rail service in London, England. It is operated by London Overground Rail Operations as part of the National Rail network, under the franchise control and branding of Transport for London (TfL). Since the start of operations in 2007, it has consisted of four routes; the Gospel Oak to Barking Line, North London Line, West London Line and Watford DC Line. During 2010 the East London Line, which was formerly part of the London Underground and has been closed since 2007 for rebuilding and extension, will form part of the network.^[2]