services operating from Watford Junction to the City. These eventually ran to and from Liverpool Street via a new section of track, the Graham Road Curve. British Rail replaced the existing three-car electric trains (built 1957) with slightly newer but shorter two-car electric trains (built 1959), leading to overcrowding. In 1988, by reorganising and reducing services on the Great Northern routes from Moorgate, about 18 relatively modern dual-voltage electric trains were transferred to operate the North London and Watford services, from both Euston and Liverpool Street. Several voluntary sector groups, the Railway Development Society (RDS, later Railfuture), Transport 2000's then London groups, and the Capital Transport Campaign, launched a series of leaflets and briefings promoting a concept called Outer Circle. This name had once been used for a semi-circular service from Broad Street to Mansion House, which ceased during World War I. Mayor of London and GLA The pamphlets and briefings, first issued in 1997, initially suggested a route from Clapham Junction to the Greenwich Peninsula, intended to improve access from south London to the Millennium Dome. However, this was thwarted by architect Richard Rogers who considered that a railway route on a viaduct could cause "community severance", and so the Victorian brick viaduct was demolished. Nothing further happened to develop this network until after the new Greater London Authority (GLA) was launched in 2000. But the lobbying discreetly continued, with a series of short briefings published by one RDS member based in North London. Mayoral and GLA candidates were approached to discuss the viability of the Outer Circle concept. The principle was widely supported and was adopted into the first Mayor's Transport Plan, published in 2001. Meanwhile, a pilot scheme was launched in 2003 to bring several National Rail local services, mainly in South London, operated by Connex South Eastern, Southern and South West Trains under the ON – Overground Network brand. TfL introduced consistent information displays, station signage and maps on the selected routes in South London. Although this pilot was primarily an exercise in branding, some service improvements were introduced, and it was the first instance of the newly created TfL having a visible influence over National Rail services. The pilot scheme was later dropped. In January 2004 the Department for Transport (DfT) announced a review of the rail industry in Great Britain. As part of that review, TfL proposed a "London Regional Rail Authority" to give