The government has said it will be able to avoid having to pay compensation fees to rail operators, with all the current contracts set to expire by 2027.
The privatisation of rail operations took place in the mid-1990s under the Conservative prime minister John Major, but the rail network remained public, run by Network Rail.
Four of 14 operators in England have been taken over by the state in recent years because of poor performance, but this was meant to be a temporary fix before a return to the private sector.
The main rail operators in Scotland and Wales, where transport policy is handled by the devolved administrations in Edinburgh and Cardiff, are also state-owned.
British railways have faced a constant stream of strikes over pay and conditions in the last few years due to a cost-of-living crisis.
Train cancellations are commonplace and passengers regularly complain about high ticket prices.
© Agence France-Presse