First Rail London is a British train operating company owned by FirstGroup that operates the London Overground concession.
History Transport for London shortlisted Arriva, FirstGroup, Go-Ahead Group and Transport UK Group for the next London Overground contract.
In December 2025, FirstGroup was awarded the contract with First Rail London, and took over the concession from Arriva Rail London on 3 May 2026. The contract runs for eight years, with the option to extend it by two additional years.
Rolling stock First Rail London inherited a fleet of Class 378 and Class 710 rolling stock.
Current fleet Family Class ImageType Top speed Number Train Numbers Cars Seat layout Routes operated Built mph km/h Bombardier Electrostar378/1 CapitalstarEMU7512020378135–1545LongitudinalEast London lineSouth London line2009–10378/2 CapitalstarEMU7512037378201–378234378255–3782575LongitudinalNorth London lineWest London lineEast London lineSouth London lineWatford DC line2008–11Bombardier Aventra710/1 EMU7512030710101-1304LongitudinalLea Valley linesRomford–Upminster line2017–20710/2EMU7512018710256-2734LongitudinalGospel Oak to Barking lineWatford DC line2017–20710/3EMU751206710374-3795LongitudinalWatford DC line2020
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