Three rail operators will be renationalised by Labour next year, but the move is not expected to bring down fares for passengers travelling on these lines.
Transport Secretary Heidi Alexander said she recognised that "affordability is really important to people" but that people were "willing to pay for a good service".
It comes as the government confirmed South Western Railway will be renationalised in May 2025, C2C in July 2025, and Greater Anglia in autumn 2025, after Labour passed a law allowing it to do so.
But some have criticised the plans, arguing that public ownership will not make much difference unless it is paired with fresh investment in the railways.