Southeastern's bid services person been taken implicit by the government.
Franchise holder Govia was informed of the determination past period aft failing to state much than £25m of payer funding.
Transport Secretary Grant Shapps said the Operator of Last Resort would instrumentality implicit the moving to support taxpayers' interests.
Passengers are improbable to spot immoderate contiguous changes arsenic trains, timetables and fares volition enactment the same.
Southeastern's immense web includes London, Kent, East Sussex and the High Speed 1 line.
The franchise was owned by Govia - a associated task betwixt Go-Ahead Group and Keolis.
The authorities stepped successful aft an probe by the Department for Transport (DfT) identified Govia had not declared millions of pounds of historical payer funding.
The DfT said the wealth had since been reclaimed.
Further investigations are being conducted and the authorities is considering much action, including fiscal penalties.
Anthony Smith, main enforcement of rider watchdog Transport Focus, said: "Passengers volition privation a punctual, reliable, cleanable train, with capable country to beryllium and stand, and worth for wealth fares."
Cat Hobbs, manager of nationalist ownership run radical We Own It, said "privatisation is failing our railway" and called for the full obstruction web to beryllium brought into nationalist hands "where it belongs".
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