Potential devoluiton of the London rail network to mayor Boris Johnson has been criticised by other Conservative MPs, according to reports.
Complaints to the Department for Transport have been made by several Tories whose constituencies are in Kent and Hertfordshire, two of the areas Mr Johnson has targeted as taking control of local lines.
The Financial Times reports that the MPs are concerned the proposals will penalise commuters in the Conservative Home County heartlands.
Last year, Mr Johnson and Transport for London submitted plans to take control of regional rail on Southeastern and Greater Anglia services.
But Kent MPs have written to transport minister Stephen Hammond with concerns that the deal could mean price hikes and timetable changes for commuters from the area due to subsidising other London lines.
The county has 17 seats, all of which are Conservative held. Charlie Elphicke, MP for Dover, told the FT: 'Pretty much every single Kent MP I have spoken to is upset by this.
'We need to keep this for the national interest rather than letting one region have complete control.'