HS2 and train users will suffer because the Prime Minister has done nothing but "dither and delay", says the Shadow transport secretary.
Labour's Maria Eagle accused of David Cameron of failing "to provide the leadership necessary" to successfully steer the £50 billion project.
"David Cameron has disastrously failed to provide the leadership necessary to build support and make progress on actually delivering the vital new north-south rail line.
"As a result of three years of dither and delay, there is no prospect of securing parliamentary approval for the first phase of the scheme before the next election.
"The Government must now redouble their efforts to make the new north-south rail line a reality and ensure it remains on budget and on track."